Theme directory

[compscidr]

Similar to the plugin directory except it lets us showcase themes / templates

[compscidr]

Shipped and live on goblog.live:

• Theme loader on top of themes/default (Theme loader: override-by-name, installed root, static fallback #585); directory theme builder, /themes pages, submit flow (Theme directory: /themes pages, registry theme builder, kind-aware curation #586); theme installer + Admin → Themes (Admin → Themes: one-click theme install from the directory #587) — v0.5.0.
• Kind auto-detected from the manifest, listing layout fix (Directory: detect plugin vs theme from the manifest; fix headings under Tachyons #589); release → iac dispatch so deploys follow releases (Release workflow: notify iac when a tagged image is pushed #588) — v0.5.1.
• goblogplatform/goblog-theme-forest v1.0.0 is the first listed theme; /themes/index.json serves it.
• Builder docs for themes (Writing a theme, Publishing a theme, Directory formats) at goblog.live/docs — v0.6.0 (Builder documentation: docs/guide + CI lint #591–Docs plugin: in-article links follow a renamed page slug #593).

Remaining polish from the reviews is tracked in #590.