build: publish @insignia/iios-* SDKs to the Gitea package registry

- .npmrc routes the @insignia scope to https://git.lynkedup.cloud/api/packages/insignia/npm/
  (auth via ${GITEA_TOKEN} env — no secret committed).
- The 9 frontend SDK packages (contracts, kernel-client, adapter-sdk, *-web) are now
  publishable: private dropped, version 0.1.0, publishConfig pinned to Gitea. iios-service
  and iios-testkit stay private (pnpm publish skips them).
- Root `release` / `release:dry` scripts; a Gitea Actions workflow publishes on a v* tag.
- PUBLISHING.md documents publish + consumer (.npmrc) setup.

Verified: dry-run packs cleanly and workspace:* deps resolve to 0.1.0 in the tarball.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/iios-adapter-sdk/package.json

@@ -1,15 +1,19 @@
 {
   "name": "@insignia/iios-adapter-sdk",
-  "version": "0.0.0",
-  "private": true,
+  "version": "0.1.0",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
-  "files": ["dist"],
+  "files": [
+    "dist"
+  ],
   "scripts": {
     "build": "tsc -p tsconfig.json",
     "typecheck": "tsc -p tsconfig.json --noEmit"
   },
   "dependencies": {
     "@insignia/iios-contracts": "workspace:*"
+  },
+  "publishConfig": {
+    "registry": "https://git.lynkedup.cloud/api/packages/insignia/npm/"
   }
 }