feat(git): add advanced clone options (shallow, sparse, flags)

Add advanced clone options support across the frontend and backend.
Users can specify a branch, shallow limits, blobless mode, sparse paths,
and custom clone flags when initiating a clone operation. The backend
validates inputs, parses custom flags without invoking a shell, and
configures sparse checkouts after a successful clone. A small parsing
dependency was added and tracked-file parsing was improved to better
handle git ls-files output.

- Introduce CloneRunOptions and validation helpers for clone inputs
- Parse custom flags with a shell-like tokenizer and block managed flags
- Support sparse checkout configuration and shallow clone constraints

src/lib/git.ts

@@ -4,6 +4,7 @@ import type {
   AiReviewResult,
   AiCommitPlan,
   CommitAiProvider,
+  CloneOptions,
   ConflictFile,
   DetectedExternalTool,
   ExternalToolCommand,
@@ -80,6 +81,7 @@ export function cloneRepository(
   username?: string,
   password?: string,
   commitLimit = 100,
+  options: CloneOptions = { branch: null, blobless: false, customFlags: "", shallowDepth: null, shallowSince: null, sparse: false, sparsePaths: [] },
 ): Promise<RepositoryBundle> {
   return invoke<RepositoryBundle>("clone_repository", {
     remoteUrl,
@@ -88,6 +90,13 @@ export function cloneRepository(
     username: username ?? null,
     password: password ?? null,
     commitLimit,
+    branch: options.branch,
+    blobless: options.blobless,
+    customFlags: options.customFlags,
+    shallowDepth: options.shallowDepth,
+    shallowSince: options.shallowSince,
+    sparse: options.sparse,
+    sparsePaths: options.sparsePaths,
   });
 }