Moved around more code. Implemented more sqlc. Added support to generate swagger.

Added support for profiling. Removed the pkg module altogether.
Everything except old sync is now using code generated by sqlc.

internal/db/migrations/000002_adjust_fields_for_sqlc.down.sql

@@ -0,0 +1,3 @@
+Alter table game
+alter column number_of_songs set null,
+alter column hash set null;