Auto-commit extra files (#197)

Whenever Dyad does a commit from a proposal, it will automatically amend
the commit with outside changes (e.g. made outside of Dyad).

This helps avoid a lot of user confusion, e.g.
https://github.com/dyad-sh/dyad/issues/187

https://www.reddit.com/r/dyadbuilders/comments/1kjysc0/error_pushing_images/

Edge cases:
If a user adds a file outside of Dyad, and then they hit retry, it will
revert these outside changes, but it's still technically in the version
history, so I think it's OK. This should also be a pretty unusual
situation.

Fixes #164 
Fixes #187

src/hooks/useStreamChat.ts

@@ -14,7 +14,7 @@ import { useChats } from "./useChats";
 import { useLoadApp } from "./useLoadApp";
 import { selectedAppIdAtom } from "@/atoms/appAtoms";
 import { useVersions } from "./useVersions";
-import { showUncommittedFilesWarning } from "@/lib/toast";
+import { showExtraFilesToast } from "@/lib/toast";
 import { useProposal } from "./useProposal";
 import { useSearch } from "@tanstack/react-router";
 import { useRunApp } from "./useRunApp";
@@ -87,8 +87,11 @@ export function useStreamChat({
               setIsPreviewOpen(true);
               refreshAppIframe();
             }
-            if (response.uncommittedFiles) {
-              showUncommittedFilesWarning(response.uncommittedFiles);
+            if (response.extraFiles) {
+              showExtraFilesToast({
+                files: response.extraFiles,
+                error: response.extraFilesError,
+              });
             }
             refreshProposal(chatId);