Add search index (#15)

- Add utility rebuild script
- Add Search to header
- Add shell of search page
- Add search query support to ItemList

src/start.php

@@ -67,7 +67,8 @@ function title_bar(): void {
                     $hasBookmarks = $bookResult && $bookResult->fetchArray(SQLITE3_NUM)[0];
                     echo hx_get('/feeds', 'Feeds') . ' | ';
                     if ($hasBookmarks) echo hx_get('/?bookmarked', 'Bookmarked') . ' | ';
-                    echo hx_get('/docs/', 'Docs') . ' | <a href=/user/log-off>Log Off</a>';
+                    echo hx_get('/search', 'Search') . ' | ' . hx_get('/docs/', 'Docs')
+                        . ' | <a href=/user/log-off>Log Off</a>';
                     if ($_SESSION[Key::USER_EMAIL] != Security::SINGLE_USER_EMAIL) {
                         echo " | {$_SESSION[Key::USER_EMAIL]}";
                     }