fix: normalize workflow manifest schema

[dickymoore]

What

Normalize workflow manifest generation so all rows conform to the 4-column schema expected by IDE config tooling.

Why

Installer preserved legacy rows that still contained a fifth standalone column, producing _cfg/workflow-manifest.csv files with mismatched column counts. IDE setup then failed with Invalid Record Length: columns length is 4, got 5.
Fixes #1070: #1070

How

• Parse existing workflow-manifest rows into structured objects instead of keeping raw lines.
• Escape/quote values and rewrite every row with exactly name,description,module,path columns.

Testing

• Manual: reinstall BMAD locally after change; _cfg/workflow-manifest.csv now matches header and IDE setup proceeds without CSV parse errors.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on this repository.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[bmadcode]

thanks @dickymoore !