feat: implemented many commands

- added register command
- added reset command
- added users command
- added agg command
- added feeds command

sql/queries/feeds.sql

@@ -0,0 +1,14 @@
+-- name: CreateFeed :one
+INSERT INTO feeds (id, created_at, updated_at, name, url, user_id)
+VALUES (
+  $1,
+  $2,
+  $3,
+  $4,
+  $5,
+  $6
+)
+RETURNING *;
+
+-- name: GetAllFeeds :many
+SELECT id, created_at, updated_at, name, url, user_id FROM feeds;