feat: implemented many commands

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

sql/schema/002_feeds.sql

@@ -0,0 +1,13 @@
+-- +goose Up
+CREATE TABLE feeds (
+  id UUID PRIMARY KEY,
+  created_at TIMESTAMP NOT NULL,
+  updated_at TIMESTAMP NOT NULL,
+  name TEXT NOT NULL,
+  url TEXT UNIQUE NOT NULL,
+  user_id UUID NOT NULL,
+  FOREIGN KEY(user_id) REFERENCES users(id) ON DELETE CASCADE
+);
+
+-- +goose Down
+DROP TABLE feeds;