Add tvOS support by using caches directory instead of application support (#470)

On tvOS, `.applicationSupportDirectory` is unavailable, so switch to
`.cachesDirectory` for the default database path. Also remove redundant
`createDirectory` calls that are now handled by `FileManager.default.url(create:true)`.

Author: joseph-elmallah

Sources/SQLiteData/CloudKit/Internal/Metadatabase.swift

@@ -16,10 +16,6 @@
       open "\(url.path(percentEncoded: false))"
       """
     )
-    try FileManager.default.createDirectory(
-      at: .applicationSupportDirectory,
-      withIntermediateDirectories: true
-    )
 
     @Dependency(\.context) var context
     guard !url.isInMemory || context != .live

Sources/SQLiteData/CloudKit/SyncEngine.swift

@@ -2247,10 +2247,6 @@
         containerIdentifier: containerIdentifier
       )
       let path = url.isInMemory ? url.absoluteString : url.path(percentEncoded: false)
-      try FileManager.default.createDirectory(
-        at: .applicationSupportDirectory,
-        withIntermediateDirectories: true
-      )
       let database: any DatabaseWriter =
         url.isInMemory
         ? try DatabaseQueue(path: path)