[Doc] Add rtmlib examples

[Tau-J]

Motivation

Modification

BC-breaking (Optional)

Use cases (Optional)

Checklist

Before PR:

• I have read and followed the workflow indicated in the CONTRIBUTING.md to create this PR.
• Pre-commit or linting tools indicated in CONTRIBUTING.md are used to fix the potential lint issues.
• Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• New functionalities are covered by complete unit tests. If not, please add more unit tests to ensure correctness.
• The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

• CLA has been signed and all committers have signed the CLA in this PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5a3be94) 71.74% compared to head (b9de30c) 71.67%.

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #2923      +/-   ##
===========================================
- Coverage    71.74%   71.67%   -0.07%     
===========================================
  Files          293      293              
  Lines        20068    20068              
  Branches      3406     3406              
===========================================
- Hits         14397    14384      -13     
- Misses        4853     4863      +10     
- Partials       818      821       +3     

Flag	Coverage Δ
unittests	71.67% <ø> (-0.07%)	⬇️

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