chore: rebrand as @supsys/discovery and update repository URLs

- Change package name from @astrojs/discovery to @supsys/discovery
- Update repository URL to git.supported.systems
- Update CHANGELOG references
- Rebuild and verify all tests pass (89/89)

package.json

@@ -1,7 +1,7 @@
 {
-  "name": "@astrojs/discovery",
+  "name": "@supsys/discovery",
   "version": "1.0.0",
-  "description": "Complete discovery integration for Astro - handles robots.txt, llms.txt, humans.txt, and sitemap generation",
+  "description": "Complete discovery integration for Astro - handles robots.txt, llms.txt, humans.txt, security.txt, canary.txt, webfinger, and sitemap generation",
   "type": "module",
   "exports": {
     ".": "./dist/index.js",
@@ -36,15 +36,22 @@
     "astro-integration",
     "astro-component",
     "robots",
+    "robots-txt",
     "sitemap",
     "llms",
     "llms-txt",
     "humans",
     "humans-txt",
+    "security-txt",
+    "canary-txt",
+    "webfinger",
+    "activitypub",
     "discovery",
     "seo",
     "ai",
-    "llm"
+    "llm",
+    "rfc9116",
+    "rfc7033"
   ],
   "author": {
     "name": "Ryan Malloy",
@@ -53,10 +60,10 @@
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "https://github.com/withastro/astro-discovery"
+    "url": "git@git.supported.systems:astro/astro-discovery.git"
   },
   "bugs": {
-    "url": "https://github.com/withastro/astro-discovery/issues"
+    "url": "https://git.supported.systems/astro/astro-discovery/issues"
   },
-  "homepage": "https://github.com/withastro/astro-discovery#readme"
+  "homepage": "https://git.supported.systems/astro/astro-discovery"
 }