Use marketplace-only plugin installs and organize documentation

[JerryLinLinLin]

Plugins now install through the marketplace; GitHub Releases carry native runtimes and supporting metadata. Hyper-V downloads and verifies its pinned EXE on first start, then reuses it. The launcher update has its own plugin version and keeps the existing runtime unchanged.

• Remove plugin/skill archive publication paths and validate runtime-only output, notices, inventories, and checksums.
• Replace the homepage's plugin headings with a table and keep resource sections to links.
• Organize documentation into guides, reference material, and component/versioned validation records with an index. Check local and repository links automatically.
• Preserve the single PR workflow and add coverage for automatic setup, clean MCP stdout, checksum rejection, reuse, and retry.

Validation: marketplace and documentation checks passed; Rizin and Hyper-V runtime packaging checks passed; launcher tests passed using a controlled executable without UAC or VM operations. The rebuilt Hyper-V EXE matches its existing published checksum, and retained Frida evidence is unchanged. Windows CI also runs the existing native unit, protocol, and installer checks.