Regenerate docs, update CHANGELOG for v1.0.0, clean up registry manifest

- Regenerated docs/ via tfplugindocs: 51 files covering all 20 resources
  and 30 data sources with auto-extracted schemas and examples
- Removed stale docs for old resources (build.md, ssh.md)
- CHANGELOG.md: added v1.0.0 entry with full feature list, breaking
  changes, and security notes
- terraform-registry-manifest.json: confirmed protocol_versions ["6.0"]
  is correct for Terraform Plugin Framework

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

terraform-registry-manifest.json

@@ -1,6 +1,6 @@
 {
-    "version": 1,
-    "metadata": {
-        "protocol_versions": ["6.0"]
-    }
+  "version": 1,
+  "metadata": {
+    "protocol_versions": ["6.0"]
+  }
 }