docs: add docker-language-server validation and update documentation

Document docker-language-server LSP build and validation success.

Changes:
- STATUS.md: Added docker-language-server as validated LSP (v0.0.0, 49.2MB)
- AGENTS.md: Moved docker-language-server to Development Tools section
- AGENTS.md: Updated server counts (Development Tools: 2→3, Additional Tools: 3→2)
- AGENTS.md: Added No Language/Prebuilt category for LSP servers

Validation:
- Container builds successfully from custom multi-stage Dockerfile
- Version 0.0.0 verified with --version flag
- Crush wrapper script functional
- User acceptance testing completed in fresh Crush session

AGENTS.md

@@ -24,10 +24,11 @@ This document tracks the AI agents and MCP servers configured in this project.
 | terraform-mcp | kneldevstack-aimiddleware-terraform-mcp | IaC automation, HCP Terraform, workspace management |
 | cloudron-mcp | kneldevstack-aimiddleware-cloudron-mcp | Self-hosted app management |
 
-#### Development Tools (2 servers)
+#### Development Tools (3 servers)
 | Service | Container Name | Description |
 |---------|---------------|-------------|
 | bash-language-server | kneldevstack-aimiddleware-bash-language-server | LSP for bash (diagnostics, completion, formatting) |
+| docker-language-server | kneldevstack-aimiddleware-docker-language-server | LSP for Dockerfiles, Compose files, Bake files |
 | context7-mcp | kneldevstack-aimiddleware-context7-mcp | MCP server framework and SDK for documentation |
 
 #### Content Management (4 servers)
@@ -61,11 +62,10 @@ This document tracks the AI agents and MCP servers configured in this project.
 | elasticsearch-mcp | kneldevstack-aimiddleware-elasticsearch-mcp | Search and index management (Rust) |
 | audiobook-mcp | kneldevstack-aimiddleware-audiobook-mcp | Audiobook management with AI-powered features |
 
-#### Additional Tools (3 servers)
+#### Additional Tools (2 servers)
 | Service | Container Name | Description |
 |---------|---------------|-------------|
 | drawio-mcp | kneldevstack-aimiddleware-drawio-mcp | Draw.io diagram management |
-| docker-language-server | kneldevstack-aimiddleware-docker-language-server | Language server for Dockerfiles, Compose files, Bake files |
 | penpot-mcp | kneldevstack-aimiddleware-penpot-mcp | Design collaboration platform integration |
 
 ## Agent Capabilities
@@ -105,6 +105,11 @@ Most use `uvx` for installation:
 - Kubernetes MCP (also available via npx)
 - Terraform MCP
 
+#### No Language/Prebuilt (3 servers)
+- bash-language-server (npm prebuilt)
+- docker-language-server (Go binary)
+- marksman (prebuilt binary)
+
 #### Rust (1 server)
 - Elasticsearch MCP