refactor(collections): migrate to generic crud interface

- Refactored collections to use the generic crud interface
- Also, implement pagination for collections

Author: maniac-en

db/queries/collections.sql

@@ -1,8 +1,13 @@
 -- name: CreateCollection :one
 INSERT INTO collections (name) VALUES (?) RETURNING *;
 
--- name: GetAllCollections :many
-SELECT * FROM collections;
+-- name: GetCollectionsPaginated :many
+SELECT * FROM collections
+ORDER BY created_at DESC
+LIMIT ? OFFSET ?;
+
+-- name: CountCollections :one
+SELECT COUNT(*) FROM collections;
 
 -- name: UpdateCollectionName :one
 UPDATE collections