Add pinned and locked to thread table and setup routes

internal/database/seed.sql

@@ -17,6 +17,8 @@ CREATE TABLE IF NOT EXISTS threads (
     subject TEXT NOT NULL DEFAULT '',
     created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
     bumped_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    pinned BOOLEAN NOT NULL DEFAULT 0,
+    locked BOOLEAN NOT NULL DEFAULT 0,
     FOREIGN KEY (board_slug) REFERENCES boards(slug) ON DELETE CASCADE ON UPDATE CASCADE
 );