docs: refresh README and testing guidance

[ryanbarlow97]

Move LuckPerms setup details into Docs and clarify current tests and report locations.

Follows the README layout and documentation ownership rules in TF-Minecraft/Docs. Related guide updates: TF-Minecraft/Docs#110.

Validation: git diff --check; README links, source paths and anchors checked against the task worktrees. Feature and test claims checked against current source and build configuration. Plugin/runtime suites were not rerun for these documentation edits.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: d3d4013d-1b02-4288-92d1-9ec5143dfd78

📥 Commits

Reviewing files that changed from the base of the PR and between 367aa93 and f2284dc.

📒 Files selected for processing (1)

• README.md

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📝 Summary

Summary by CodeRabbit

• Documentation
  • Updated the README overview and feature descriptions to cover account linking, website codes, account updates, tier synchronisation and player metadata sharing.
  • Revised build and testing guidance, including where to find dependency preparation instructions and test reports, and which external systems are not covered by tests.
  • Removed the dedicated LuckPerms bridge section and its configuration and operating details.

Walkthrough

The README now describes TFMCWeb’s account-linking, website-code and account-update functions. It removes the dedicated LuckPerms bridge section and updates build and test guidance.

Changes

README update

Layer / File(s)	Summary
Project description and testing guidance README.md	The README updates the project and feature descriptions, removes the dedicated LuckPerms bridge section, and revises test, coverage and report details.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Other

Suggested reviewers: xxfran10xx

Merge Risk: ⚪ Minimal · up to f2284

The README’s revised feature descriptions and core testing guidance are supported by the checked-in project; no confirmed issue currently blocks merging.

• Autopilot · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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