chore: align repo structure with plugin conventions

Add missing config files (.eslintrc.js, .prettierrc.js, .pluginrc,
.mcp.json, renovate.json), documentation (CLAUDE.md, CONTRIBUTING.md,
README.md, SECURITY.md, LICENSE), CI/CD workflows (ci.yaml, release.yaml),
and Claude agent definitions. Rename package from headlamp-intel-gpu-plugin
to intel-gpu to match the short-name convention used by all other plugins.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -0,0 +1,15 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(done)",
+      "Bash(npm install:*)",
+      "Bash(git add:*)"
+    ]
+  },
+  "enabledMcpjsonServers": [
+    "github",
+    "kubernetes",
+    "flux",
+    "playwright"
+  ]
+}