docs: Add ip_based i3c_controller testbench

[gastmaier]

PR Description

Merge after #154.
Considering main testbench, not the (future) rework.

PR Type

• Bug fix (change that fixes an issue)
• New feature (change that adds new functionality)
• New test (change that adds new test program and/or testbench)
• Breaking change (has dependencies in other repositories/testbenches)

PR Checklist

• I have followed the code style guidelines
• I have performed a self-review of changes
• I have ran all testbenches affected by this PR
• I have commented my code, at least hard-to-understand parts
• I have signed off all commits from this PR
• I have updated the documentation (wiki pages, ReadMe files, Copyright etc)
• I have not introduced new Warnings/Errors on compilation/elaboration/simulation
• I have set the verbosity level to none for the test program

[gastmaier]

V1:

• Fix preposition
• uppercase ID
• Remove watchdog
• HDL dependencies

Force push to rebase on main

[gastmaier]

V2:

• testbench misspell

• rebased