cli: Add ability to force init and new commands via cli

[johnanthos]

Problem

Currently there's no way to force init and new commands via the cli. This is described at #2669.

Summary of changes

• Add a --force argument to the init command
• Update tests with new flag
• Update changelog

Fixes #2669

[vercel]

@johnanthos is attempting to deploy a commit to the coral-xyz Team on Vercel.

A member of the Team first needs to authorize it.

[acheroncrypto]

Thank you, this is looking good for anchor init but #2669 also mentions anchor new, could you add it as well?

[johnanthos]

@acheroncrypto thank you so much for the quick review and feedback. On it.

[johnanthos]

@acheroncrypto added to the new command, updated the changelog and the PR description and title.

[acheroncrypto]

Almost ready. Fixed the CI errors(rustfmt, and clippy) and did a bit of refactoring. The only remaining question is #2698 (comment), it shouldn't matter functionally but let me know what you think of removing the force checks for subfolders.

[acheroncrypto]

Looks great! Thank you for addressing the feedback quickly and including a PR explanation.