Added Quest friend management features

- Added `ic_question_tip.xml` and `ic_success_tip.xml` vector drawables for UI icons.
- Created layout files for friend-related dialogs: `dialog_add_friend.xml` and `dialog_friend_code.xml`.
- Implemented `item_friend.xml` for displaying individual friend cards in the friends list.
- Developed `page_friends.xml` for the main friends page layout, including empty state handling.
- Added unit tests in `RksysFriendsTest.kt` to validate friend management logic and interactions.
- Introduced `SidebarStatusTest.kt` to ensure proper status reading and SVG path parsing.

android/app/src/main/res/values/strings.xml

@@ -14,6 +14,20 @@
     <string name="launcher_section_online">Online</string>
     <string name="launcher_nav_rooms">Rooms</string>
     <string name="launcher_nav_leaderboard">Leaderboard</string>
+    <string name="launcher_nav_friends">Friends</string>
+    <string name="launcher_friends_count">%1$d/%2$d</string>
+    <string name="sidebar_info">Info</string>
+    <string name="sidebar_status_failed">Failed to retrieve Wheel Wizard status</string>
+    <string name="sidebar_made_by">Quest port by iChris4\nWheel Wizard by Patchzy\nand WantToBeeMe</string>
+    <string name="sidebar_about">About</string>
+    <string name="sidebar_discord">Talk to us!</string>
+    <string name="sidebar_github">Source code</string>
+    <string name="sidebar_support">Support us!</string>
+    <string name="launcher_friends_online_none">There are currently no friends online</string>
+    <plurals name="launcher_friends_online">
+        <item quantity="one">There is currently %d friend online</item>
+        <item quantity="other">There are currently %d friends online</item>
+    </plurals>
     <string name="launcher_players_online_none">There are currently no players online</string>
     <plurals name="launcher_players_online">
         <item quantity="one">There is currently %d player online</item>
@@ -203,6 +217,49 @@
     <string name="leaderboard_unknown_player">Unknown Player</string>
     <string name="leaderboard_view_room">View Room</string>
     <string name="leaderboard_no_room">Could not find an active room for this player.</string>
+    <string name="friends_disclaimer">To add friends you need to add them in-game.</string>
+    <string name="friends_add">Add Friend</string>
+    <string name="friends_add_button">Add friend</string>
+    <string name="friends_list_title">Friends</string>
+    <string name="friends_sort_by">Sort by :</string>
+    <string name="friends_sort_online">Is Online</string>
+    <string name="friends_sort_name">Name</string>
+    <string name="friends_sort_races">Races played</string>
+    <string name="friends_empty_title">No friends yet!</string>
+    <string name="friends_empty_message">You can add friends in-game</string>
+    <string name="friends_online">Online</string>
+    <string name="friends_offline">Offline</string>
+    <string name="friends_pending">Pending</string>
+    <string name="friends_br">BR</string>
+    <string name="friends_br_full">Battle Rating</string>
+    <string name="friends_wins">Wins</string>
+    <string name="friends_losses">Losses</string>
+    <string name="friends_no_room">Whoops, could not find the room that this player is supposedly playing in.</string>
+    <string name="friends_code_message">Enter a 12-digit friend code.</string>
+    <string name="friends_code_hint">0000-0000-0000</string>
+    <string name="friends_submit">Submit</string>
+    <string name="friends_looking_up">Looking the friend code up on Retro WFC…</string>
+    <string name="friends_not_found">Could not find that friend code online.</string>
+    <string name="friends_profile_no_mii">This profile has no valid Mii data.</string>
+    <string name="friends_confirm_question">Is this who you want to add?</string>
+    <string name="friends_confirm_vr">VR %1$d</string>
+    <string name="friends_unknown_player">Unknown player</string>
+    <string name="friends_added">Added %1$s to your friend list.</string>
+    <string name="friends_remove">Remove Friend</string>
+    <string name="friends_remove_question">Remove %1$s (%2$s) from your friend list?</string>
+    <string name="friends_removed">Removed %1$s from your friend list.</string>
+    <string name="friends_list_full">Your friend list is full.</string>
+    <string name="friends_list_full_remove">Your friend list is full. Remove a friend and try again.</string>
+    <string name="friends_no_license">Select a valid license before adding friends.</string>
+    <string name="friends_code_empty">Friend code cannot be empty.</string>
+    <string name="friends_code_digits">Friend code must be exactly 12 digits.</string>
+    <string name="friends_code_invalid">Invalid friend code.</string>
+    <string name="friends_code_own">You cannot add your own friend code.</string>
+    <string name="friends_already">This friend is already in your list.</string>
+    <string name="friends_not_in_list">Friend was not found in this license.</string>
+    <string name="friends_no_save">Retro Rewind\'s save could not be read. Play it once with a licence first.</string>
+    <string name="friends_cannot_write">Retro Rewind\'s save could not be written.</string>
+    <string name="friends_close_game">Close the game first: it reads the friend list from its save.</string>
     <plurals name="time_days">
         <item quantity="one">%d day</item>
         <item quantity="other">%d days</item>
@@ -438,6 +495,8 @@
     <string name="about_credit_title_mod_browser">Mod browser</string>
     <string name="about_credit_title_profiles">My profiles</string>
     <string name="about_credit_title_miis">My Miis</string>
+    <string name="about_credit_title_online">Online</string>
+    <string name="about_credit_online">Rooms, Leaderboard and Friends show Retro WFC\'s (rwfc.net) rooms, leaderboard and player profiles, and Friends reads and changes the friend list in Retro Rewind\'s save, as Wheel Wizard does. The status beside the version is the Wheel Wizard team\'s, from Wheel Wizard\'s data.</string>
     <string name="about_credit_title_toolchain">On-headset builds</string>
     <string name="about_credit_title_dolphin">Dolphin</string>
     <string name="about_credit_title_logo">Logo</string>