0.10.0: Archify Sync, optional live collaboration on a model

Several people edit one model at once through a server you run yourself
(archify-vscode-ext-sync); the files stay ordinary files on each disk.
Sign-in through the browser, offline-first with later merge, teammates'
cursors in the Source view and text editors, and a Shared section on the
model page with people, versions, Compare and Restore.

Without a server nothing changes: the sync code is a separate bundle that
loads only when a model is shared, after a sign-in, or when a sync command
or invite link is used.

src/webview/messages.ts

@@ -2,6 +2,7 @@ import path from 'node:path';
 import * as vscode from 'vscode';
 import { repoRootFor } from '../archify/runtime';
 import { log } from '../util/log';
+import type { LiveAction } from '../sync/liveBridge';
 
 export type WebviewMessage =
   | { type: 'hash'; hash: string }
@@ -14,6 +15,8 @@ export type WebviewMessage =
   | { type: 'openDecision'; file: string }
   | { type: 'showGraph'; query?: string }
   | { type: 'showModel' }
+  | { type: 'liveReady' }
+  | { type: 'liveAction'; action: LiveAction }
   | { type: 'error'; message: string };
 
 /** Column for opening files next to a webview without covering it. */
@@ -100,6 +103,8 @@ export async function handleWebviewMessage(
       case 'openDiagram':
       case 'showGraph':
       case 'showModel':
+      case 'liveReady':
+      case 'liveAction':
         // Handled by the view, which knows the model root.
         break;
     }