Standardize documentation nomenclature and improve editorial quality

[Amiga500]

Phase 1: Nomenclature Fixes ✅
Standardize device references to "Miyoo Mini" (base model) and "Miyoo Mini Plus" (Plus model)
Replace abbreviations "MMP", "MM+", "Mini+" with "Miyoo Mini Plus" in prose contexts as same for Miyoo Mini.
Fix "Onion OS" → "OnionOS" (all instances corrected)
Update versioned documentation (v4.1 and v4.2) with same fixes
Fix "RetroArch" capitalization throughout all documents (was "Retroarch", "retroarch")
Standardize Wi-Fi/WiFi usage (Wi-Fi for prose, WiFi for technical/label contexts)

Phase 2: Punctuation and Formatting ✅
Fix spacing around punctuation marks (commas, colons, semicolons)
Remove spaces before commas
Add proper spacing after commas
Fix colons with proper spacing (e.g., "like :" → "like:")
Add Oxford commas where appropriate
Improve sentence structure and flow

Phase 3: Grammar and Style Review ✅
Improve sentence fluidity (e.g., "However, its integration...")
Fix grammatical errors (e.g., "such a tiny device", "official" not "offcial", "Many" not "Meny")
Fix spelling errors (e.g., "equipped" not "equiped", "possibilities" not "possibilites")
Maintain professional yet accessible tone throughout
Add commas for better readability in complex sentences

Summary of Changes ✅
48 files modified across docs, blog posts, and versioned documentation
120+ lines changed with improved consistency and professionalism
All instances of incorrect nomenclature corrected
Punctuation standardized across all documentation
Grammar and style improved for better readability
Wi-Fi/WiFi usage now consistent (Wi-Fi in prose, WiFi in technical contexts)

Files Updated ✅
Core documentation (docs/)
Blog/release notes (blog/)
Versioned docs v4.1 and v4.2 (versioned_docs/)
Installation guides, FAQ, app documentation, network features, emulator guides, multiplayer documentation, and community apps

[helmasaur]

Why didn't you copy-paste the text? Could be useful, for example while searching through issues and PR.

[tGecko]

Hi there, thanks for your contribution. Most of them are perfect, but you'll need to change some of them so we can accept it:

• don't touch yarn.lock
• don't touch versioned docs
• don't touch blog posts, and release notes
• remove the AI .md files (like BRANCH_WORK_SUMMARY.md)
• OnionOS should always be simply "Onion", as that's the official name
• Normalize to "MMP" where it is implied or repeated, and "Miyoo Mini Plus" where it is appropriate (like the website header)

Make sure to test and visibly inspect every site you change.

[Amiga500]

Hi @tGecko, thanks for your suggestions, i will keep that in mind, i'll prefer to close this PR and work from scratch locally.

[Amiga500]

@Aemiii91 @tGecko I'm doing some tests with Copilot, on the left the official page, on the right the local one with some modifications. If no one on the team plans to work on it soon and you give me the OK, I can continue with this approach.

[tGecko]

I think we should keep the human written text. The right one instantly feels like AI wrote it. It's a bit too much imo

[Amiga500]

That's fine!