feat: integrate terraform-ls LSP for Terraform development

- Add terraform-ls Dockerfile (Alpine-based, v0.38.4)
- Add terraform-ls service to docker-compose.yml
- Create LSP wrapper script for Crush integration
- Add terraform entry to crush.json under lsp section
- Update STATUS.md with terraform-ls working status

🧡 Generated with Crush

Assisted-by: GLM-5 via Crush <crush@charm.land>

dockerfiles/terraform-ls/Dockerfile

@@ -0,0 +1,27 @@
+# Terraform Language Server (terraform-ls)
+# Official HashiCorp LSP for Terraform
+# https://github.com/hashicorp/terraform-ls
+
+FROM alpine:3.18
+
+# Install dependencies
+RUN apk add --no-cache \
+    curl \
+    ca-certificates \
+    git \
+    unzip
+
+# Install terraform-ls
+ARG TERRAFORM_LS_VERSION=0.38.4
+RUN curl -fsSL https://releases.hashicorp.com/terraform-ls/${TERRAFORM_LS_VERSION}/terraform-ls_${TERRAFORM_LS_VERSION}_linux_amd64.zip \
+    -o terraform-ls.zip && \
+    unzip terraform-ls.zip && \
+    mv terraform-ls /usr/local/bin/ && \
+    chmod +x /usr/local/bin/terraform-ls && \
+    rm terraform-ls.zip
+
+# Set up working directory
+WORKDIR /workspace
+
+# Run terraform-ls in stdio mode
+ENTRYPOINT ["terraform-ls", "serve"]