Add TASK_PROPOSALS.md with targeted typo, bug, docs, and test tasks

[Bavs89]

Motivation

• The terminal plugin contains a user-facing typo in an installation log that should be corrected for professionalism and searchability.
• startAxs() uses asynchronous readAsset callbacks without awaiting file-write completion, which can introduce a race condition when launching the sandbox.
• The JSDoc for startAxs() is inconsistent with runtime behavior and should be aligned to avoid confusion for integrators and tooling.
• A sanity test currently asserts only inside a catch, creating a false positive if the error-throwing code is accidentally removed.

Description

• Add a new file TASK_PROPOSALS.md that lists four concrete tasks addressing a typo, a race-condition bug, a JSDoc mismatch, and a fragile test.
• Each task includes a short rationale and precise file location, e.g. src/plugins/terminal/www/Terminal.js and src/test/sanity.tests.js.
• The file was created and staged as part of the change set to document the proposed follow-up work.

Testing

• Verified the file contents with nl -ba TASK_PROPOSALS.md, which displayed the new file successfully.
• Checked repository status with git status --short, which showed the new file as untracked prior to committing.
• Added and committed the file with git add TASK_PROPOSALS.md && git commit -m "Add codebase task proposals for typo, bug, docs, and tests", which completed successfully.

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Codex Task