docs(README): Add requirements chapter

[TheJanzap]

Purpose of this PR:

I added a requirements chapter to the README to inform users what copy of MKW is required in order to play RR or Wiicompiled with WheelWizard.

How to Test:

None.

What Has Been Changed:

Section in the README.

Related Issue Link:

None.

Checklist before merging

• You have created relevant tests

Summary by CodeRabbit

• Documentation
  • Added a Requirements section explaining that users need their own Mario Kart Wii game backup.
  • Listed supported backup formats, including ISO, GCM, GCZ, CISO, WBFS, WIA, and RVZ.
  • Added a region compatibility table for Retro Rewind in Dolphin and Wiicompiled.

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📝 Walkthrough

Walkthrough

README.md adds a Requirements section. It states that users need a self-dumped Mario Kart Wii backup, lists accepted formats, and documents region requirements for Retro Rewind in Dolphin and Wiicompiled.

Changes

Requirements documentation

Layer / File(s)	Summary
Document backup and region requirements README.md	The README lists accepted backup formats and specifies region requirements for Retro Rewind in Dolphin and Wiicompiled.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to c35b3

The README adds requirements documentation, with only a minor punctuation typo in the documented .ciso file extension. The change is otherwise merge-ready after correcting that documentation error.

Poem

A rabbit checks the formats in a row

ISO and RVZ are ready to go
Regions sit neatly in a table
PAL RMCP01 marks the cable
Dolphin welcomes every region bright
The README now guides the ride right

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the documentation change: adding a requirements chapter to the README.
Description check	✅ Passed	The description includes all required template sections and explains the documentation purpose. It states that testing is not applicable and that no tests were added because this is a documentation-on…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

The description includes all required template sections and explains the documentation purpose. It states that testing is not applicable and that no tests were added because this is a documentation-only change.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

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Actionable comments posted: 1

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Inline comments:
In `@README.md`:
- Line 23: Correct the accepted-format list in the README by changing the
`.ciso.` entry to `.ciso`, keeping the other documented extensions unchanged.

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ℹ️ Review info

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Run ID: 151b157f-5c9a-4f6a-9d17-dd10b837412a

📥 Commits

Reviewing files that changed from the base of the PR and between 945ba73 and c35b380.

📒 Files selected for processing (1)

• README.md

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