fix non git info

[sushobhit-lt]

This pull request improves how the application handles cases where the current directory is not a Git repository. The main changes ensure that relevant context information is set when Git is unavailable, and update related functions to support this behavior.

Handling non-Git repository scenarios:

• The isGitRepo function in src/lib/git.ts now accepts a Context object and calls setNonGitInfo to update context when the directory is not a Git repo.
• Added a new setNonGitInfo function in src/lib/git.ts to populate ctx.git with default values and handle baseline branch and GitHub URL logic when Git is unavailable.

Function signature and usage updates:

• Updated the usage of isGitRepo in src/tasks/getGitInfo.ts to pass the context object, ensuring consistent handling of non-Git scenarios throughout the codebase.