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>

docs/index.md

@@ -3,26 +3,31 @@
 page_title: "virtfusion Provider"
 subcategory: ""
 description: |-
-  
+  The VirtFusion provider allows managing VirtFusion virtualization platform resources.
 ---
 
 # virtfusion Provider
 
-
+The VirtFusion provider allows managing VirtFusion virtualization platform resources.
 
 ## Example Usage
 
 ```terraform
 provider "virtfusion" {
-  endpoint  = "example.com"
-  api_token = "myapikey"
+  endpoint  = "https://cp.example.com"
+  api_token = var.virtfusion_api_token
+}
+
+variable "virtfusion_api_token" {
+  type      = string
+  sensitive = true
 }
 ```
 
 <!-- schema generated by tfplugindocs -->
 ## Schema
 
-### Required
+### Optional
 
-- `api_token` (String) The API token to use for API requests.
-- `endpoint` (String) The endpoint to use for API requests.
+- `api_token` (String, Sensitive) The API token for authentication. Can also be set with the `VIRTFUSION_API_TOKEN` environment variable.
+- `endpoint` (String) The VirtFusion API endpoint. Can be a hostname (e.g. `cp.example.com`) or full URL (e.g. `https://cp.example.com/api/v1`). Can also be set with the `VIRTFUSION_ENDPOINT` environment variable.