Untrack generated docs and local configs

[GatewayJ]

Type of Change

• New Feature
• Bug Fix
• Documentation
• Performance Improvement
• Test/CI
• Refactor
• Other: repository hygiene

Related Issues

N/A

Summary of Changes

Untracks generated/local documentation and assistant configuration files that should not live in the upstream repository.

Updates .gitignore to ignore local assistant configuration directories consistently.

Refreshes the README documentation links and adds the RustFS Operator architecture image.

Checklist

• I have read and followed the CONTRIBUTING.md guidelines
• Passed make pre-commit (fmt-check + clippy + test + console-lint + console-fmt-check)
• Added/updated necessary tests (N/A: documentation and repository hygiene only)
• Documentation updated (if needed)
• CHANGELOG.md updated under [Unreleased] (N/A: removes tracked generated changelog)
• CI/CD passed (if applicable)

Impact

• Breaking change (CRD/API compatibility)
• Requires doc/config/deployment update
• Other impact: removes generated/local files from version control

Verification

make pre-commit

Additional Notes

Draft PR created from fork branch GatewayJ:chore/untrack-docs-ignore-codex into rustfs/operator:main.

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