Remove hardcoded avatar image library

Delete the bundled character avatar JPGs and the AvatarLibrary/AvatarProvider
Kotlin files that referenced them.

app/src/main/java/com/fluxa/app/ui/catalog/AvatarLibrary.kt

@@ -1,24 +0,0 @@
-package com.fluxa.app.ui.catalog
-
-data class AvatarCategory(
-    val showName: String,
-    val imdbId: String,
-    val characters: List<AvatarCharacter> = emptyList() // Will be populated dynamically
-)
-
-data class AvatarCharacter(
-    val name: String,
-    val url: String
-)
-
-object AvatarLibrary {
-    private val defaultCategories = listOf(
-        AvatarCategory("The Boys", "TheBoys"),
-        AvatarCategory("Breaking Bad", "BreakingBad"),
-        AvatarCategory("Peaky Blinders", "PeakyBlinders"),
-        AvatarCategory("Invincible", "Invincible"),
-        AvatarCategory("Avatar: The Last Airbender", "ATLA")
-    )
-
-    val categories: List<AvatarCategory> = defaultCategories
-}

app/src/main/java/com/fluxa/app/ui/catalog/AvatarProvider.kt

@@ -1,34 +0,0 @@
-package com.fluxa.app.ui.catalog
-
-import android.content.Context
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
-import java.io.File
-import java.util.concurrent.ConcurrentHashMap
-
-object AvatarProvider {
-    private val cache = ConcurrentHashMap<String, List<AvatarCharacter>>()
-
-    suspend fun fetchAvatarsForShow(context: Context, folderName: String): List<AvatarCharacter> = withContext(Dispatchers.IO) {
-        cache[folderName]?.let { return@withContext it }
-
-        val basePath = "profile_avatars/$folderName"
-        val characters = runCatching {
-            context.assets.list(basePath)
-                .orEmpty()
-                .filter { fileName -> fileName.endsWith(".jpg", true) || fileName.endsWith(".jpeg", true) || fileName.endsWith(".png", true) || fileName.endsWith(".webp", true) || fileName.endsWith(".gif", true) }
-                .sorted()
-                .map { fileName ->
-                    val name = fileName.substringBeforeLast('.')
-                        .replace('-', ' ')
-                        .replace('_', ' ')
-                        .split(' ')
-                        .filter { it.isNotBlank() }
-                        .joinToString(" ") { part -> part.replaceFirstChar(Char::titlecase) }
-                    AvatarCharacter(name, "file:///android_asset/$basePath/${File(fileName).name}")
-                }
-        }.getOrDefault(emptyList())
-        cache[folderName] = characters
-        characters
-        }
-}