repo: move to github.com/tangency-labs/fieldcraft (URLs, updater, Pages)

The updater's release endpoint, docs, README, release notes and the Pages
URL point at the tangency-labs org. App IDs (io.github.jyviko.fieldcraft)
stay unchanged so installed copies keep their identity and settings.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

.github/release-notes.md

@@ -1,9 +1,9 @@
 FieldCraft is open-source CAE pre-processing in Rust: it turns geometry into analysis-ready
 finite element models, writes Abaqus, Nastran and LS-DYNA decks, and solves linear static and
 modal problems with its own solver. AI agents can drive it over MCP (`fieldcraft-cli mcp`).
-[README](https://github.com/jyviko/fieldcraft#readme) ·
-[roadmap](https://github.com/jyviko/fieldcraft/blob/main/ROADMAP.md) ·
-[issues](https://github.com/jyviko/fieldcraft/issues)
+[README](https://github.com/tangency-labs/fieldcraft#readme) ·
+[roadmap](https://github.com/tangency-labs/fieldcraft/blob/main/ROADMAP.md) ·
+[issues](https://github.com/tangency-labs/fieldcraft/issues)
 
 **Which file?**
 - **macOS 11+** (Apple silicon and Intel): open `fieldcraft-{version}-macos-universal.dmg` and

.github/workflows/pages.yml

@@ -1,4 +1,4 @@
-# The web app (apps/fieldcraft-web, docs/web.md) on GitHub Pages: https://jyviko.github.io/fieldcraft/
+# The web app (apps/fieldcraft-web, docs/web.md) on GitHub Pages: https://tangency-labs.github.io/fieldcraft/
 # After SolidCraft's pages.yml (MIT OR Apache-2.0; see ATTRIBUTION.md).
 #
 # A push to `main` (a release; main holds released code only) builds the app with Trunk (release,