[Schema] Extention for debugger RTT

[soumeh01]

Changes

• Implemented schema extension for https://open-cmsis-pack.github.io/cmsis-toolbox/pyOCD-Debugger/#rtt

Checklist

• 🤖 This change is covered by unit tests (if applicable).
• 🤹 Manual testing has been performed (if necessary).
• 🛡️ Security impacts have been considered (if relevant).
• 📖 Documentation updates are complete (if required).
• 🧠 Third-party dependencies and TPIP updated (if required).

[github-actions]

Test Results

    3 files     21 suites   14m 9s ⏱️
  459 tests   459 ✅ 0 💤 0 ❌
1 377 runs  1 377 ✅ 0 💤 0 ❌

Results for commit a419b1b.

[soumeh01]

Please ignore the coverage job failing and complaining for -0.02% less coverage, as it is a false positive (because there are no code changes) and could occur because of the rounding differences as well.
The community conventions for this are to have a threshold or small buffer (like 0.1%) to avoid false negatives/positives in CI. Which I am planning to address in another PR.

[brondani]

LGTM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.61%. Comparing base (cda5b73) to head (a419b1b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2453      +/-   ##
==========================================
- Coverage   65.62%   65.61%   -0.01%     
==========================================
  Files         145      145              
  Lines       28060    28060              
  Branches    16039    16039              
==========================================
- Hits        18413    18412       -1     
  Misses       7384     7384              
- Partials     2263     2264       +1     

Flag	Coverage Δ
projmgr-cov	88.26% <ø> (-0.02%)	⬇️

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see 1 file with indirect coverage changes

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