Lore v0.6.3

Submission readiness for the Claude Code community marketplace. Anthropic's
review pipeline reads the plugin directory on its own terms — it runs
claude plugin validate and expects the plugin to document itself — so the two
places where Lore relied on the surrounding repository are closed.

The plugin directory now documents itself

• Problem. plugins/lore/ had no README.md. Every install, usage, and
  contribution instruction lived in the repository root README, one level up.
  A reader — or reviewer — landing on the plugin directory found a manifest and
  four source folders with nothing explaining what they were.
• What changed. Added plugins/lore/README.md: the component table
  (commands, skills, subagents, hooks) and pointers to the root README, the
  website, and CLAUDE.md. Per Rule 4 it references the install/update
  commands rather than restating them — the root README stays their single
  source of truth.

homepage points at the product site

• Problem. The manifest's homepage and repository were both the GitHub
  URL, so the plugin manager surfaced the source tree where it could surface
  the product page.
• What changed. homepage is now https://lorekit.net; repository still
  points at GitHub. A version bump ships with it because consumers only receive
  manifest changes when version moves.

Verified. claude plugin validate ./plugins/lore passes, every relative
link in the new README resolves to a file that exists, and sh tests/run-tests.sh
plus CI pass unchanged.