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/resources/server_build.md

@@ -0,0 +1,47 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "virtfusion_server_build Resource - virtfusion"
+subcategory: ""
+description: |-
+  Builds a VirtFusion server with an operating system. This is a one-time operation — once a server is built, it stays built.
+---
+
+# virtfusion_server_build (Resource)
+
+Builds a VirtFusion server with an operating system. This is a one-time operation — once a server is built, it stays built.
+
+## Example Usage
+
+```terraform
+resource "virtfusion_server_build" "node1_build" {
+  server_id = virtfusion_server.node1.id
+  name      = "my-server"
+  hostname  = "my-server.example.com"
+  osid      = 1
+  vnc       = true
+  ipv6      = false
+  ssh_keys  = [virtfusion_ssh_key.mykey.id]
+  email     = false
+}
+```
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- `name` (String) The name for the server build.
+- `osid` (Number) The operating system ID to install.
+- `server_id` (Number) The ID of the server to build.
+
+### Optional
+
+- `email` (Boolean) Whether to send a notification email after build.
+- `hostname` (String) The hostname for the server.
+- `ipv6` (Boolean) Whether to enable IPv6.
+- `ssh_keys` (List of Number) List of SSH key IDs to add to the server.
+- `vnc` (Boolean) Whether to enable VNC access.
+
+### Read-Only
+
+- `id` (String) The identifier of the server build (same as server_id).