Create Testing Framework

[aadityare]

This PR creates a testing framework to feed a YAML file, run test-cases and capture relevant output. Mainly helps bulk-run ShardGuard with multiple prompts and capture metrics including

• Time taken per-run, Average run-time (hardware environment specific, can change based on specs)
• Success Rate, verbose errors and warnings

Can be easily extended to capture further required metrics.

Note: Needs to be merged with Execution Implementation (perhaps locally) to test/work

Sample Output:

📊 TEST SUMMARY
======================================================================

Total Tests: 20
✅ Passed: 1
⚠️  Warnings: 15
❌ Failed: 4

Success Rate: 80.0%
⏱️  Total Time: 1552.75s
⏱️  Average Time: 77.64s per test```