add auto-updater and git workflow enhancements

This change introduces a comprehensive auto-update mechanism for the application and significant improvements to the integrated Git client experience.

Key features include:
- **Automated Release Workflow:** A new Gitea Actions workflow (`app_builder.yaml`) and a Python `cicd_tool` are added to automatically build, sign, and upload release artifacts to S3-compatible storage (MinIO) upon a new release. This also generates the `latest.json` file required by the updater.
- **Tauri Updater Integration:** The `tauri-plugin-updater` is integrated into the application, enabling it to check for and apply updates seamlessly.
- **Robust Git Push Handling:** The application now intelligently handles non-fast-forward push failures by prompting the user to perform a pull/merge operation before re-attempting the push.
- **Enhanced File Comparison:** A new `compare_file_to_parent` command is introduced, allowing detailed file diffs against a commit's direct parent, including the "empty tree" for initial commits.
- **Explorer Panel Improvements:** "Expand All" and "Collapse All" functionality is added to the file explorer for better navigation.

src-tauri/src/main.rs

@@ -4,15 +4,17 @@ mod git;
 
 use git::{
     cancel_code_search, checkout_branch, commit, compare_commits, compare_file_to_head,
-    cred_delete, cred_load, cred_save, diff_file_against_working_tree, get_remote_url, get_status,
-    list_branches, list_commits, list_file_history, list_repository_files, merge_branch,
-    open_repository, pull, push, read_conflict, resolve_conflict, resolve_conflict_side,
-    restore_file_from_commit, restore_files, restore_to_commit, search_code_introductions,
-    stage_files, unstage_files, SearchCancellationState,
+    compare_file_to_parent, cred_delete, cred_load, cred_save, diff_file_against_working_tree,
+    get_remote_url, get_status, list_branches, list_commits, list_file_history,
+    list_repository_files, merge_branch, open_repository, pull, push, read_conflict,
+    resolve_conflict, resolve_conflict_side, restore_file_from_commit, restore_files,
+    restore_to_commit, search_code_introductions, stage_files, unstage_files,
+    SearchCancellationState,
 };
 
 fn main() {
     tauri::Builder::default()
+        .plugin(tauri_plugin_updater::Builder::new().build())
         .manage(SearchCancellationState::default())
         .plugin(tauri_plugin_dialog::init())
         .invoke_handler(tauri::generate_handler![
@@ -34,6 +36,7 @@ fn main() {
             list_file_history,
             compare_commits,
             compare_file_to_head,
+            compare_file_to_parent,
             diff_file_against_working_tree,
             search_code_introductions,
             cancel_code_search,