Add LSP Dockerfiles for bash, docker, and marksman

- bash-language-server: Prebuilt npm package (190MB)
- docker-language-server: Multi-stage Go build (49.2MB)
- marksman: Debian with libicu72 for .NET runtime (144MB)
- All configured for Crush via stdio communication

dockerfiles/bash-language-server/Dockerfile

@@ -2,12 +2,9 @@ FROM node:22-alpine
 
 WORKDIR /app
 
-COPY package.json package-lock.json* ./
+# Install prebuilt bash-language-server from npm
+RUN npm install -g bash-language-server
 
-RUN npm ci
-
-COPY . .
-
-RUN npm run build
-
-CMD ["node", "dist/index.js"]
+# Set entrypoint
+ENTRYPOINT ["bash-language-server"]
+CMD ["start"]