Implement EditAccount in Backend

postgres/queries/accounts.sql

@@ -25,4 +25,11 @@ ORDER BY accounts.name;
 SELECT accounts.id, accounts.budget_id, accounts.name, true as is_account FROM accounts
 WHERE accounts.budget_id = @budget_id
 AND accounts.name LIKE @search
-ORDER BY accounts.name;
+ORDER BY accounts.name;
+
+-- name: UpdateAccount :one
+UPDATE accounts
+SET name = $1,
+    on_budget = $2
+WHERE accounts.id = $3
+RETURNING *;