feat(audoedit): reactive config singleton (#6530)

Makes autoedits config singleton reactive to auth status. This is not
enough to make autoedits fully reactive and remove the requirement to
reload VS Code, but this part is required for analytics logger
integration tests I'll add in one of the follow-up PRs.

vscode/src/autoedits/autoedits-config.ts

@@ -3,6 +3,7 @@ import * as vscode from 'vscode'
 import {
     type AutoEditsModelConfig,
     type AutoEditsTokenLimit,
+    authStatus,
     isDotComAuthed,
 } from '@sourcegraph/cody-shared'
 
@@ -85,6 +86,10 @@ export function getAutoeditsProviderConfig(): AutoeditsProviderConfig {
 
 /**
  * A singleton for the static autoedits provider config.
- * TODO: make it reactive to VS Code settings changes.
  */
-export const autoeditsProviderConfig = getAutoeditsProviderConfig()
+export let autoeditsProviderConfig = getAutoeditsProviderConfig()
+
+// Recompute autoedits config on auth status change.
+authStatus.subscribe(() => {
+    autoeditsProviderConfig = getAutoeditsProviderConfig()
+})