Replace native Git with Dugite to support users without Git installed (#1760)

I moved all isomorphic-git usage into a single git_utils.ts file and
added Dugite as an alternative Git provider. The app now checks the
user’s settings and uses dugite when user enabled native git for all
isomorphic-git commands. This makes it easy to fully remove
isomorphic-git in the future by updating only git_utils.ts.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Adds Dugite-based native Git (bundled binary) and refactors all Git
calls to a unified git_utils API, replacing direct isomorphic-git usage
across the app.
> 
> - **Git Platform Abstraction**:
> - Introduces `dugite` and bundles Git via Electron Forge
(`extraResource`) with `LOCAL_GIT_DIRECTORY` setup in `src/main.ts`.
> - Adds `src/ipc/git_types.ts` and a comprehensive
`src/ipc/utils/git_utils.ts` wrapper supporting both Dugite (native) and
`isomorphic-git` (fallback): `commit`, `add`/`addAll`, `remove`, `init`,
`clone`, `push`, `setRemoteUrl`, `currentBranch`, `listBranches`,
`renameBranch`, `log`, `isIgnored`, `getCurrentCommitHash`,
`getGitUncommittedFiles`, `getFileAtCommit`, `checkout`,
`stageToRevert`.
> - **Refactors (switch to git_utils)**:
> - Replaces direct `isomorphic-git` imports in handlers and processors:
`app_handlers`, `chat_handlers`, `createFromTemplate`,
`github_handlers`, `import_handlers`, `portal_handlers`,
`version_handlers`, `response_processor`, `neon_timestamp_utils`,
`utils/codebase`.
> - Updates tests to mock `git_utils`
(`src/__tests__/chat_stream_handlers.test.ts`).
> - **Behavioral/Feature Updates**:
> - `createFromTemplate` uses `fetch` for GitHub API and `gitClone` for
cloning with cache validation.
> - GitHub integration uses `gitSetRemoteUrl`/`gitPush`/`gitClone`,
handling public vs token URLs and directory creation when native Git is
disabled.
> - Versioning, imports, app file edits, migrations now stage/commit via
`git_utils`.
> - **UI/Copy**:
>   - Updates Settings description for “Enable Native Git”.
> - **Config/Version**:
>   - Bumps version to `0.29.0-beta.1`; adds `dugite` dependency.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
ba098f7f25d85fc6330a41dc718fbfd43fff2d6c. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Will Chen <willchen90@gmail.com>

src/ipc/handlers/version_handlers.ts

@@ -7,15 +7,23 @@ import type {
   RevertVersionParams,
   RevertVersionResponse,
 } from "../ipc_types";
+import type { GitCommit } from "../git_types";
 import fs from "node:fs";
 import path from "node:path";
 import { getDyadAppPath } from "../../paths/paths";
-import git, { type ReadCommitResult } from "isomorphic-git";
 import { withLock } from "../utils/lock_utils";
 import log from "electron-log";
 import { createLoggedHandler } from "./safe_handle";
-import { gitCheckout, gitCommit, gitStageToRevert } from "../utils/git_utils";
+
 import { deployAllSupabaseFunctions } from "../../supabase_admin/supabase_utils";
+import {
+  gitCheckout,
+  gitCommit,
+  gitStageToRevert,
+  getCurrentCommitHash,
+  gitCurrentBranch,
+  gitLog,
+} from "../utils/git_utils";
 
 import {
   getNeonClient,
@@ -80,11 +88,9 @@ export function registerVersionHandlers() {
       return [];
     }
 
-    const commits = await git.log({
-      fs,
-      dir: appPath,
-      // KEEP UP TO DATE WITH ChatHeader.tsx
-      depth: 100_000, // Limit to last 100_000 commits for performance
+    const commits = await gitLog({
+      path: appPath,
+      depth: 100_000, // KEEP UP TO DATE WITH ChatHeader.tsx
     });
 
     // Get all snapshots for this app to match with commits
@@ -104,7 +110,7 @@ export function registerVersionHandlers() {
       });
     }
 
-    return commits.map((commit: ReadCommitResult) => {
+    return commits.map((commit: GitCommit) => {
       const snapshotInfo = snapshotMap.get(commit.oid);
       return {
         oid: commit.oid,
@@ -134,11 +140,7 @@ export function registerVersionHandlers() {
       }
 
       try {
-        const currentBranch = await git.currentBranch({
-          fs,
-          dir: appPath,
-          fullname: false,
-        });
+        const currentBranch = await gitCurrentBranch({ path: appPath });
 
         return {
           branch: currentBranch || "<no-branch>",
@@ -169,9 +171,8 @@ export function registerVersionHandlers() {
 
         const appPath = getDyadAppPath(app.path);
         // Get the current commit hash before reverting
-        const currentCommitHash = await git.resolveRef({
-          fs,
-          dir: appPath,
+        const currentCommitHash = await getCurrentCommitHash({
+          path: appPath,
           ref: "main",
         });