Fix tkn pac create repo when outside git repo

[chmouel]

Changes

tkn pac create repo would set the repo as "." if it was ran outside the repository, let's use the repo URL as fallback.

SRVKP-6643

Submitter Checklist

• 📝 Please ensure your commit message is clear and informative. For guidance on crafting effective commit messages, refer to the How to write a git commit message guide. We prefer the commit message to be included in the PR body itself rather than a link to an external website (ie: Jira ticket).

• ♽ Before submitting a PR, run make test lint to avoid unnecessary CI processing. For an even more efficient workflow, consider installing pre-commit and running pre-commit install in the root of this repository.

• ✨ We use linters to maintain clean and consistent code. Please ensure you've run make lint before submitting a PR. Some linters offer a --fix mode, which can be executed with the command make fix-linters (ensure markdownlint and golangci-lint tools are installed first).

• 📖 If you're introducing a user-facing feature or changing existing behaviour, please ensure it's properly documented.

• 🧪 While 100% coverage isn't a requirement, we encourage unit tests for any code changes where possible.

• 🎁 If feasible, please check if an end-to-end test can be added. See README for more details.

• 🔎 If there's any flakiness in the CI tests, don't necessarily ignore it. It's better to address the issue before merging, or provide a valid reason to bypass it if fixing isn't possible (e.g., token rate limitations).

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 65.15%. Comparing base (a10162c) to head (3c34778).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/cmd/tknpac/generate/template.go	0.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1789      +/-   ##
==========================================
- Coverage   65.16%   65.15%   -0.01%     
==========================================
  Files         174      174              
  Lines       13250    13251       +1     
==========================================
  Hits         8634     8634              
  Misses       4043     4043              
- Partials      573      574       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.