Build the Apple Container extension

Turns the empty scaffold into a working Nova extension for Apple Container
and container-compose, in the shape of the Docker Suite extension.

Sidebar (Scripts/Sidebar):
- System, Containers, Images, Volumes and Networks sections
- Containers grouped into compose projects via the com.docker.compose.project
  label container-compose stamps; project rows drive compose up/down/build
  against the matching workspace file
- Lifecycle, shell, logs, inspect, browse and copy commands per resource
- Apple Container publishes no event stream, so the sidebar polls while
  visible and only reloads a section when a fingerprint of its data changes,
  which keeps selection and expansion intact

Hostnames (Scripts/Hostnames.js):
- A container's hostname is <name>.<domain> and the domain lives in Apple
  Container's config.toml, which has no CLI setter, so the Hostname Domain
  preference reads and writes that file directly
- Changing it offers to register the domain with macOS and restart the
  services; the write preserves the file's other tables and its mode

Language support:
- Dockerfile and Compose syntaxes backed by tree-sitter grammars built by
  Tools/build-syntaxes.sh, pinned to revisions that generate ABI 14
- The Compose syntax is named dockercompose because that is the languageId
  docker-language-server recognises compose files by
- docker-language-server is downloaded on first use rather than bundled, at
  roughly 40 MB

Icons are generated by Tools/make-icons.py so they can be regenerated rather
than hand-maintained.

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01UnSBcR5Lywz5Fbj5FmVbfc

Scripts/Sidebar/TreeItems/ContainerTreeItem.js

@@ -0,0 +1,45 @@
+const { statusIcon } = require("./StatusIcon");
+
+class ContainerTreeItem extends TreeItem {
+	constructor(container) {
+		super(label(container), TreeItemCollapsibleState.None);
+
+		this.identifier = container.identifier;
+		this.image = statusIcon(container.running);
+		this.contextValue = container.running ? "container.running" : "container.stopped";
+		this.tooltip = container.tooltip;
+		this.descriptiveText = description(container);
+	}
+}
+
+function label(container) {
+	switch (nova.config.get("apple_container.containers.label", "string")) {
+		case "Image":
+			return container.imageName;
+		case "Service":
+			return container.service || container.name;
+		default:
+			return container.name;
+	}
+}
+
+function description(container) {
+	let parts = [];
+
+	if (nova.config.get("apple_container.containers.desc.image", "boolean")) {
+		parts.push(container.imageName);
+	}
+	if (nova.config.get("apple_container.containers.desc.ports", "boolean") && container.ports.length > 0) {
+		parts.push(container.portSummary);
+	}
+	if (nova.config.get("apple_container.containers.desc.address", "boolean") && container.address) {
+		parts.push(container.address);
+	}
+	if (nova.config.get("apple_container.containers.desc.state", "boolean")) {
+		parts.push(container.state);
+	}
+
+	return parts.join("  ");
+}
+
+module.exports = { ContainerTreeItem };