Move Category model and repository to domain and data layer (#8967)

To keep the commit from being 100+ files the interactors wasn't moved.

The domain module like the data module uses `tachiyomi` instead of `eu.kanade.tachiyomi` for package names

domain/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest />

domain/src/main/java/tachiyomi/domain/category/model/Category.kt

@@ -0,0 +1,17 @@
+package tachiyomi.domain.category.model
+
+import java.io.Serializable
+
+data class Category(
+    val id: Long,
+    val name: String,
+    val order: Long,
+    val flags: Long,
+) : Serializable {
+
+    val isSystemCategory: Boolean = id == UNCATEGORIZED_ID
+
+    companion object {
+        const val UNCATEGORIZED_ID = 0L
+    }
+}

domain/src/main/java/tachiyomi/domain/category/model/CategoryUpdate.kt

@@ -0,0 +1,8 @@
+package tachiyomi.domain.category.model
+
+data class CategoryUpdate(
+    val id: Long,
+    val name: String? = null,
+    val order: Long? = null,
+    val flags: Long? = null,
+)

domain/src/main/java/tachiyomi/domain/category/repository/CategoryRepository.kt

@@ -0,0 +1,28 @@
+package tachiyomi.domain.category.repository
+
+import kotlinx.coroutines.flow.Flow
+import tachiyomi.domain.category.model.Category
+import tachiyomi.domain.category.model.CategoryUpdate
+
+interface CategoryRepository {
+
+    suspend fun get(id: Long): Category?
+
+    suspend fun getAll(): List<Category>
+
+    fun getAllAsFlow(): Flow<List<Category>>
+
+    suspend fun getCategoriesByMangaId(mangaId: Long): List<Category>
+
+    fun getCategoriesByMangaIdAsFlow(mangaId: Long): Flow<List<Category>>
+
+    suspend fun insert(category: Category)
+
+    suspend fun updatePartial(update: CategoryUpdate)
+
+    suspend fun updatePartial(updates: List<CategoryUpdate>)
+
+    suspend fun updateAllFlags(flags: Long?)
+
+    suspend fun delete(categoryId: Long)
+}