Ona devcontainer and automations setup

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/javascript-node:22
+
+# shellcheck and shfmt are required by the test suite (see .github/workflows/verify.yml).
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends shellcheck shfmt \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Pin pnpm to the version in .tool-versions. The pnpm-10 lockfile is incompatible
+# with the pnpm 11 that the base image (or corepack's latest default) provides, so
+# install the exact version globally. The repo enforces pnpm via package.json preinstall.
+RUN npm install -g pnpm@10.12.1

.devcontainer/devcontainer.json

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+// The Dev Container format allows you to configure your environment. At the heart of it
+// is a Docker image or Dockerfile which controls the tools available in your environment.
+//
+// See https://aka.ms/devcontainer.json for more information.
+{
+	"name": "Bash Language Server",
+	// Node 22 base image (matches .tool-versions) extended with shellcheck, shfmt and pnpm.
+	"build": {
+		"context": ".",
+		"dockerfile": "Dockerfile"
+	}
+}

.ona/automations.yaml

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+tasks:
+  install:
+    name: Install dependencies
+    description: Install workspace dependencies with pnpm (also installs the vscode-client deps via postinstall).
+    command: |
+      pnpm install --frozen-lockfile
+    triggeredBy:
+      - postDevcontainerStart
+
+  compile:
+    name: Compile
+    description: Build the TypeScript projects.
+    command: |
+      pnpm compile
+    triggeredBy:
+      - manual
+    dependsOn:
+      - install
+
+  test:
+    name: Test
+    description: Run the Jest test suite (requires shellcheck and shfmt, provided by the dev container).
+    command: |
+      pnpm test
+    triggeredBy:
+      - manual
+    dependsOn:
+      - install
+
+services:
+  watch:
+    name: Watch
+    description: Rebuild the TypeScript projects on change.
+    commands:
+      start: |
+        pnpm watch