feat: html report

[waldo121]

Summary

Adds the --html cli flag

Related Issue

Closes #35

Type of Change

• Bug fix
• New feature
• Refactor
• Documentation update
• CLI behavior change

What Changed

List the key changes in a few bullets.

• New module for reporting with a html reporter.
• New unit test
• Docs update

Validation

• Added a test case

Checklist

• The code follows style conventions.
• I added unit tests for the new functionality.
• CI (GitHub Actions) is green.
• I updated documentation/README when needed.

Before/After Output (if applicable)

After

oracletrace sample.py --html index.html 
Summary:
Total execution time: 0.6038s
                         Top functions by Total Time                          
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━┳━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━┓
┃ Function                    ┃ Total Time (s) ┃ Calls ┃ Avg. Time/Call (ms) ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━╇━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━┩
│ sample.py:<module>          │         0.6009 │     1 │             600.902 │
│ sample.py:main              │         0.6009 │     1 │             600.871 │
│ sample.py:process_data      │         0.6008 │     2 │             300.378 │
│ sample.py:calculate_results │         0.4003 │     2 │             200.132 │
└─────────────────────────────┴────────────────┴───────┴─────────────────────┘

Logic Flow:
<module>
├── sample.py:<module> (1x, 0.6009s)
│   └── sample.py:main (1x, 0.6009s)
│       └── sample.py:process_data (2x, 0.6008s)
│           └── sample.py:calculate_results (2x, 0.4003s)
└── oracletrace/tracer.py:Tracer.stop (1x, 0.0000s)
HTML report generated: /home/raphael/src/oracletrace/index.html