Hephaestus v0.2.4

Adds end-to-end one-touch install verification and stricter install-doc checks.\n\n- Adds scripts/verify-one-touch-install.sh to test fresh HOME Claude install, fresh CODEX_HOME Codex install, and ontology GUI generation from the installed plugin cache.\n- Adds scripts/run-one-touch-terminal.command for macOS Terminal one-click smoke testing.\n- Adds scripts/verify-install-docs.sh and wires it into package verification so Codex /plugin install mistakes and stale version/name strings fail verification.\n- Keeps Codex docs on OS-terminal codex plugin commands plus in-app /plugins browser usage.\n- Bumps plugin/package version to 0.2.4 and keeps latest release aligned with main.