fix(mcp-res): publish v0.2 Pages landing copy

[aliengineering-byte]

Why

The live MCP-RES Pages landing page still described v0.1 as the current publication after the protected v0.2 prerelease shipped. This post-release documentation hotfix aligns the discoverability surface with the already-published v0.2 artifacts.

Changes

• presents Draft v0.2.0 prerelease 1 as current
• links the v0.2 specification, schemas, profile registry, implementer kit, migration guide, field corpus, release, and RFC
• updates the working quick-start validator command
• states the same-project Python validator and zero-external-adopter boundary
• retains immutable v0.1 historical links

Scope boundary

Documentation landing copy and links only. No normative tree, schema, vector, release asset, tag, package, or governance-policy change.

Verification

• pnpm exec prettier --check docs/standards/mcp-res/README.md docs/standards/mcp-res/index.html
• node scripts/check-site.mjs (33 references, 10 section targets)
• v0.2 quick-start vector validates with no diagnostics
• git diff --check