chore: add CI, coverage gates, and fix template hygiene

Wires the previously-inert @vitest/coverage-v8 into the test builder with
measured thresholds, adds a GitHub Actions workflow (format, test, build),
and fixes assorted gaps a cloning team would hit: no LICENSE, no engines/
.nvmrc, an unusable prettier install, a committed local-only settings file,
a dead 0-byte stylesheet, and a broken Karma-era VS Code test/debug config.
Also drops @angular/forms, which nothing in src/ imports.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package-lock.json

@@ -7,11 +7,11 @@
     "": {
       "name": "ng-signals-template",
       "version": "0.0.0",
+      "license": "MIT",
       "dependencies": {
         "@angular/common": "^22.1.0",
         "@angular/compiler": "^22.1.0",
         "@angular/core": "^22.1.0",
-        "@angular/forms": "^22.1.0",
         "@angular/platform-browser": "^22.1.0",
         "@angular/router": "^22.1.0",
         "rxjs": "~7.8.0",
@@ -26,6 +26,9 @@
         "prettier": "^3.8.1",
         "typescript": "~6.0.2",
         "vitest": "^4.0.8"
+      },
+      "engines": {
+        "node": "^22.22.3 || ^24.15.0 || >=26.0.0"
       }
     },
     "node_modules/@acemir/cssom": {
@@ -373,26 +376,6 @@
         }
       }
     },
-    "node_modules/@angular/forms": {
-      "version": "22.1.0",
-      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-22.1.0.tgz",
-      "integrity": "sha512-nWlSM/pPp78Sx/fBM/tFEgZxdfZe50LkCE2/hkO22Fi1UM2maGc43LDsu/s6l0q9hFep4Wj+xa30KXDBS7Cn8A==",
-      "license": "MIT",
-      "dependencies": {
-        "@standard-schema/spec": "^1.0.0",
-        "tslib": "^2.3.0",
-        "zod": "^4.0.10"
-      },
-      "engines": {
-        "node": "^22.22.3 || ^24.15.0 || >=26.0.0"
-      },
-      "peerDependencies": {
-        "@angular/common": "22.1.0",
-        "@angular/core": "22.1.0",
-        "@angular/platform-browser": "22.1.0",
-        "rxjs": "^6.5.3 || ^7.4.0"
-      }
-    },
     "node_modules/@angular/platform-browser": {
       "version": "22.1.0",
       "resolved": "https://registry.npmjs.org/@angular/platform-browser/-/platform-browser-22.1.0.tgz",
@@ -3418,6 +3401,7 @@
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@standard-schema/spec/-/spec-1.1.0.tgz",
       "integrity": "sha512-l2aFy5jALhniG5HgqrD6jXLi/rUWrKvqN/qJx6yoJsgKhblVd+iqqU4RCXavm/jPityDo5TCvKMnpjKnOriy0w==",
+      "dev": true,
       "license": "MIT"
     },
     "node_modules/@tybys/wasm-util": {
@@ -8085,6 +8069,7 @@
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.3.tgz",
       "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
+      "dev": true,
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"