* Add instruction generation for enabled toolsets and corresponding tests
* Refactor instruction generation to always include base and context management instructions
* Refactor base instruction for clarity and adjust context management instruction formatting
* Simplify changes for now
* Remove unused toolset instructions and simplify test cases for clarity
* Add test cases for issues, notifications, and discussions toolsets in instruction generation
* Update base instruction and test expectations for clarity on tool selection and context management
* Add support for disabling instructions via environment variable
* Clarify PR review workflow instruction for consistency
* Apply suggestions from code review
Co-authored-by: Ksenia Bobrova <almaleksia@github.com>
* Refactor instruction generation and testing for clarity and consistency
---------
Co-authored-by: Ksenia Bobrova <almaleksia@github.com>