feat(tests): add unittests for template generation

[chmouel]

Added unit tests for the detectLanguage and genTmpl functions in the template_test.go file. These tests cover various scenarios for detecting programming languages and generating templates based on repository content and events.

Changes

Submitter Checklist

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[savitaashture]

/test

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 64.97%. Comparing base (343e197) to head (e98abc9). Report is 3 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1797 +/- ## ========================================== + Coverage 64.92% 64.97% +0.05% ========================================== Files 175 175 Lines 13399 13398 -1 ========================================== + Hits 8699 8706 +7 + Misses 4116 4110 -6 + Partials 584 582 -2 ```

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