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-message-web/package.json

@@ -1,13 +1,19 @@
 {
   "name": "@insignia/iios-message-web",
-  "version": "0.0.0",
-  "private": true,
+  "version": "0.1.0",
   "type": "module",
   "main": "dist/index.js",
   "module": "dist/index.js",
   "types": "dist/index.d.ts",
-  "exports": { ".": { "types": "./dist/index.d.ts", "import": "./dist/index.js" } },
-  "files": ["dist"],
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "files": [
+    "dist"
+  ],
   "scripts": {
     "build": "tsup",
     "typecheck": "tsc --noEmit"
@@ -23,5 +29,8 @@
     "react": "^19.0.0",
     "tsup": "^8.3.5",
     "typescript": "^5.7.3"
+  },
+  "publishConfig": {
+    "registry": "https://git.lynkedup.cloud/api/packages/insignia/npm/"
   }
 }