scaffold: 12 Hobbies Studio site + OpenScribe project page

Initial static site (no framework, no build) for the 12 Hobbies Studio maker
studio, featuring OpenScribe as the flagship project.

What changed:
- index.html: studio home - hero, featured OpenScribe block with sync diagram,
  projects grid, about. British spelling, dark warm theme.
- projects/openscribe.html: OpenScribe product page. Leads with the "bring your
  own AI" differentiator, an interactive provider picker, the feature set, a
  four-step build guide, and licensing.
- assets/styles.css: all styling (palette, cards, featured layout, picker, code blocks).
- assets/app.js: dependency-free provider picker that swaps a sample server .env
  snippet across Ollama / OpenAI / Anthropic / Groq / LM Studio - on message with
  OpenScribe's any-AI design.
- README, LICENSE (MIT for site code), .gitignore.

Why:
- The user asked to develop a site on 12 Hobbies Studio; this is the first cut,
  showcasing OpenScribe and the connect-to-any-AI capability. Branding uses sensible
  defaults and is trivially editable (noted in README).

Notes:
- Pure static files; deploy to any static host or Forgejo Pages. Validated: app.js
  passes node --check; HTML section tags balanced.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 12 Hobbies Studio
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.