fix(amazonq): auto save the current file when users trigger auto debug commands (aws#7883)

## Problem
Amazon Q couldn't make changes to unsaved files. When users apply fix
commands to unsaved files, Amazon Q couldn't fix those problems.

## Solution
Auto save the file when users clicking on the fix commands.

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

---------

Co-authored-by: invictus <[email protected]>

Author: MarcoWang3

packages/amazonq/src/lsp/chat/autoDebug/commands.ts

@@ -97,6 +97,10 @@ export class AutoDebugCommands implements vscode.Disposable {
                 if (!editor) {
                     return
                 }
+                const saved = await editor.document.save()
+                if (!saved) {
+                    throw new Error('Failed to save document')
+                }
                 await this.controller.fixSpecificProblems(range, diagnostics)
             },
             'Fix with Amazon Q',
@@ -114,6 +118,10 @@ export class AutoDebugCommands implements vscode.Disposable {
                 if (!editor) {
                     return
                 }
+                const saved = await editor.document.save()
+                if (!saved) {
+                    throw new Error('Failed to save document')
+                }
                 await this.controller.fixAllProblemsInFile(10) // 10 errors per batch
             },
             'Fix All with Amazon Q',