Bug: [Session should not fail if Context Repo cloning fails & other Git Operation Issues]

[sallyom]

🐛 Bug Description

• If user provides a non-existent git branch session should not fail, user should get a warning message that clone failed

• If user provides a repository for which claude can't access due to authentication, user should get a warning message, but session should not fail.

• There should be an option to provide a base repository branch

• User should be able to tell claude to create a working branch either with a user-provided name or claude should generate a name

• Claude should NEVER write to main/dev/prod branches

• If given a main/dev/prod branch, Claude should ask user if they want to create a working branch or are they only using this repo for context.