Replace execSync shell commands with execFileSync and use repository.add API for staging files

- Refactor git-repository-utils.ts to replace all instances of execSync with execFileSync by passing arguments as an array to prevent shell command injection, and replace the git add shell execution with the built-in repository.add(files_to_stage) method.

└── apps
    └── editor
        ├── package.json
        └── src
            ├── commands
            │   ├── copy-merge-commit-details-command.ts
            │   ├── generate-commit-message-commands
            │   │   ├── actions
            │   │   │   ├── get-prompt-data.ts
            │   │   │   └── run-generate-action.ts
            │   │   ├── generate-commit-message-commands.ts
            │   │   └── utils
            │   │       └── build-commit-message-prompt.ts
            │   └── select-files-of-commit-command.ts
            ├── i18n
            │   └── translations
            │       └── utils
            │           ├── git-repository-utils.ts
            │           └── index.ts
            ├── utils
            │   └── git-repository-utils.ts
            └── views
                └── prompt
                    └── backend
                        └── utils
                            └── symbols
                                └── git
                                    └── replace-git-symbols.ts

Author: robertpiosik

apps/editor/src/utils/git-repository-utils.ts

@@ -1,4 +1,4 @@
-import { execSync } from 'child_process'
+import { execFileSync } from 'child_process'
 import * as path from 'path'
 import * as vscode from 'vscode'
 import { t } from '@/i18n'
@@ -280,9 +280,13 @@ export const prepare_staged_changes = async (params: {
                   lines.map((l: string) => '+' + l).join('\n')
               }
             } else {
-              const raw_diff = execSync(`git diff -- "${change.uri.fsPath}"`, {
-                cwd: params.repository.rootUri.fsPath
-              }).toString()
+              const raw_diff = execFileSync(
+                'git',
+                ['diff', '--', change.uri.fsPath],
+                {
+                  cwd: params.repository.rootUri.fsPath
+                }
+              ).toString()
 
               if (
                 raw_diff.includes('\n+++ /dev/null') ||
@@ -522,16 +526,11 @@ export const prepare_staged_changes = async (params: {
       }
     }
 
-    const file_args = files_to_stage
-      .map((file: string) => `"${file.replace(/"/g, '\\"')}"`)
-      .join(' ')
-    execSync(`git add -- ${file_args}`, {
-      cwd: params.repository.rootUri.fsPath
-    })
+    await params.repository.add(files_to_stage)
     await params.repository.status()
   }
 
-  const diff = execSync('git diff --staged', {
+  const diff = execFileSync('git', ['diff', '--staged'], {
     cwd: params.repository.rootUri.fsPath
   }).toString()