Add devenv support and tool versions

.devcontainer/.gitignore

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+# User-specific devcontainer directory with merged personal preferences
+user/

.devcontainer/devenv.yaml

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+# Devenv project configuration
+# Edit this file to configure your project's devcontainer
+# and then run `devenv generate` to create the devcontainer.json files
+
+name: "cdk"
+
+# Modules: Built-in functionality
+# - mise: Install and configure mise for dev tools management (https://mise.jdx.dev/)
+# - docker-in-docker: Enable running Docker containers within the devcontainer
+# - scala: Add IDE plugins and jar caching for Scala development
+# - node: Add IDE plugins for Node.js development
+# To disable, comment out or remove items from this list
+modules:
+  - mise
+  # - docker-in-docker  # (disabled by default)
+  # - scala  # (disabled by default)
+  - node  # (disabled by default)
+
+# Optional: Container image to use (defaults to latest ubuntu LTS)
+# image: "mcr.microsoft.com/devcontainers/base:ubuntu"
+
+# Optional: Ports to forward
+# forwardPorts:
+#   - 8080  # same port on host and container
+#   - "8000:9000"  # hostPort:containerPort
+
+# Optional: Mount directories from host to container
+# mounts:
+#   - "source=${localEnv: HOME}/.gu/example,target=/home/vscode/.gu/example,readonly,type=bind,consistency=cached"
+
+# Optional: IDE plugins - shared project plugins like language support
+# plugins:
+#   vscode: []
+#   intellij: []
+
+# Optional: Commands to run after container creation
+# Each command has a 'cmd' field and a 'workingDirectory' field
+# e.g.
+# postCreateCommand:
+#   - cmd: "npm install"
+#     workingDirectory: "."
+#   - cmd: "make setup"
+#     workingDirectory: "/workspaces/project"
+# postStartCommand:
+#   - cmd: "echo 'Container started successfully'"
+#     workingDirectory: "."

.devcontainer/shared/devcontainer.json

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+{
+  "name" : "cdk",
+  "image" : "mcr.microsoft.com/devcontainers/base:ubuntu",
+  "customizations" : {
+    "vscode" : {
+      "extensions" : [
+        "hverlin.mise-vscode"
+      ]
+    },
+    "jetbrains" : {
+      "plugins" : [
+        "com.github.l34130.mise",
+        "NodeJS"
+      ]
+    }
+  },
+  "forwardPorts" : [
+  ],
+  "mounts" : [
+    {
+      "source" : "devenv-mise-data-volume",
+      "target" : "/mnt/mise-data",
+      "type" : "volume"
+    }
+  ],
+  "containerEnv" : {
+    "MISE_DATA_DIR" : "/mnt/mise-data",
+    "MISE_INSTALL_PATH" : "/mnt/mise-data/mise"
+  },
+  "remoteEnv" : {
+    "PATH" : "${containerEnv:PATH}:/mnt/mise-data/shims"
+  },
+  "postCreateCommand" : "((cd . && bash -c ' echo -e \"\\033[1;34m[setup] Setting up mise.\\033[0m\" &&  echo -e \"\\033[1;34m[setup] ensure correct ownership of the shared mise data volume\\033[0m\" && sudo chown -R vscode:vscode /mnt/mise-data &&  echo -e \"\\033[1;34m[setup] checking for mise already present\\033[0m\" && (test -f $MISE_INSTALL_PATH && echo -e \"\\033[1;34m[setup] mise is present\\033[0m\") || (echo -e \"\\033[1;34m[setup] Installing mise...\\033[0m\" && curl -fsSL https://mise.run/bash | sh) &&  echo -e \"\\033[1;34m[setup] Symlinking $MISE_INSTALL_PATH to /usr/local/bin/mise...\\033[0m\" && sudo ln -sf $MISE_INSTALL_PATH /usr/local/bin/mise &&  echo -e \"\\033[1;34m[setup] checking mise working correctly\\033[0m\" && mise --version &&  echo -e \"\\033[1;34m[setup] updating mise if needed\\033[0m\" && (mise self-update --yes || echo \"Skipping mise self-update - you may be offline\") &&  echo -e \"\\033[1;34m[setup] trusting (See: https://mise.jdx.dev/cli/trust.html)\\033[0m\" && (mise trust --yes || true) &&  (mise install || echo -e \"\\033[1;33m[setup] mise install failed. You may need to run mise install manually inside the container.\\033[0m\") &&  echo -e \"\\033[1;34m[setup] final checks\\033[0m\" && export PATH=\"/mnt/mise-data/shims:$PATH\" && mise doctor &&  echo -e \"\\033[1;32m[setup] mise setup complete at $MISE_INSTALL_PATH.\\033[0m\"  ')) | sudo tee /var/log/post-create.log"
+}