feat: only use tools to write internal files

[Morriz]

Again some files in the .taskmaster/ folder where moved around!

Motivation

It seems taskmaster is given no guard rails as to what it can do on the file system, which I understand for coding, but in the .taskmaster/ folder everything should go via tools to guaranteed integrity.

Proposed Solution

• add mask to where taskmaster can write, and force tools usage for internal management.