feat(#64): applying Job validation

[h1alexbel]

closes #64

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PR-Codex overview

This PR focuses on adding job validation and posting validation errors to GitHub.

Detailed summary

• Added JobValidation class for validating jobs against rules.
• Modified GhNew class to apply job validation and post validation errors.
• Added TkGitHubITCase to test invalid job submission.
• Added GhOrderTest to test job execution with validation.

The following files were skipped due to too many changes: src/test/java/git/tracehub/agents/github/issues/GhNewTest.java

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[codecov[bot]]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (5dcf9b9) 78.92% compared to head (3eeb033) 79.01%. Report is 7 commits behind head on master.

Files	Patch %	Lines
.../java/git/tracehub/agents/github/issues/GhNew.java	81.81%	2 Missing :warning:
...tracehub/agents/github/issues/OnAttachedLabel.java	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #154 +/- ## ============================================ + Coverage 78.92% 79.01% +0.09% Complexity 152 152 ============================================ Files 56 56 Lines 503 510 +7 Branches 23 23 ============================================ + Hits 397 403 +6 - Misses 100 101 +1 Partials 6 6 ```

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