docs: add deprecation notices to old repos #44
Description
Add deprecation banners to the old repository READMEs.
Files:
jira-ticket-cli/README.mdconfluence-cli/README.md
Banner to add at top:
> [!IMPORTANT]
> **This repository has moved to [atlassian-cli](https://github.com/open-cli-collective/atlassian-cli)**
>
> **For existing users:** No action needed! Your Homebrew/Chocolatey/Winget installation will continue to receive updates automatically.
>
> **For new issues/PRs:** Please file them at [atlassian-cli](https://github.com/open-cli-collective/atlassian-cli/issues).
>
> This repository is now archived and read-only.Keep rest of README for reference (users may have bookmarked sections).
After this: Archive repos manually in GitHub settings.