Implemented KotoIndexedArtist as well as KotoIndexedAlbum, including moving the file indexing capabilities into the KotoIndexedAlbum (subject to change).
Added g_debug messages instead of using g_message for debug purposes. Re-introduced Koto Utils with new koto_utils_get_filename_without_extension, since that is used to get the extensionless file name across both album fetching and base file name fetching.
We are now leveraging KotoButton in the KotoPlayerBar and KotoExpander. Dropped Glade UI templating from KotoWindow, set its default size using gtk_widget_set_size_request to force a minimum window size, set window title, WMClass, and icon name.
Start implementing KotoIndexedFile class to handle our provided audio files, setting its file name and attempting to parse the file name when we are not using ID3 data. The parsing is as follows:
- All `_` are replaced with whitespace
- We will attempt to remove nested references to the artist and album name (we need to implemented the relevant classes to leverage that).
- Remove any references to ` - ` followed by any stragglers `-` (without the whitespace around it).
- Split based on `.` and remove the trailing file extension, preserving the rest (so something like `Ch. 01.ogg` would be considered just `Ch. 01`).
