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/queries/song_list.sql

@@ -0,0 +1,9 @@
+-- name: InsertSongInList :exec
+INSERT INTO song_list (match_date, match_id, song_no, game_name, song_name)
+VALUES ($1, $2, $3, $4, $5);
+
+-- name: GetSongList :many
+SELECT *
+FROM song_list
+WHERE match_date = $1
+ORDER BY song_no DESC;