feat: implemented many commands

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

sql/queries/users.sql

@@ -0,0 +1,23 @@
+-- name: CreateUser :one
+INSERT INTO users (id, created_at, updated_at, name)
+VALUES (
+  $1,
+  $2,
+  $3,
+  $4
+)
+RETURNING *;
+
+-- name: GetUserByName :one
+SELECT id, created_at, updated_at, name FROM users
+WHERE name = $1;
+
+-- name: GetUserById :one
+SELECT id, created_at, updated_at, name FROM users
+WHERE id = $1;
+
+-- name: GetAllUsers :many
+SELECT id, created_at, updated_at, name FROM users;
+
+-- name: DeleteAllUsers :exec
+DELETE FROM users;