0.10.4: a real Sync button on every Archify page

A labelled Sync button sits top right on every Archify page, also in Source, and opens the Sync menu. On a shared model it turns green and reads Shared. The title-bar icon and the pre-share status bar entry are gone, with their settings.

test/integration/suite.ts

@@ -493,8 +493,6 @@ export async function run(): Promise<void> {
     // No server of anyone's built in: empty until the user sets one.
     const config = vscode.workspace.getConfiguration('archify.sync');
     assert.equal(config.get('server'), '');
-    assert.equal(config.get('statusBar'), true);
-    assert.equal(config.get('titleButton'), true);
     // The extension host's module cache: dist/sync.js (Yjs, the WebSocket) is not loaded.
     const loaded = Object.keys(require.cache).filter((file) => file.endsWith(`${path.sep}dist${path.sep}sync.js`));
     assert.deepEqual(loaded, [], 'the sync bundle is not loaded');