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

Syntaxes/Dockerfile.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<syntax name="dockerfile">
+    <meta>
+        <name>Dockerfile</name>
+        <type>script</type>
+        <preferred-file-extension>dockerfile</preferred-file-extension>
+    </meta>
+
+    <detectors>
+        <filename priority="1.0">Dockerfile,Containerfile,dockerfile,containerfile</filename>
+        <extension priority="1.0">dockerfile,containerfile</extension>
+        <match-content lines="1" priority="0.4">^#\s*syntax\s*=\s*docker</match-content>
+        <match-content lines="20" priority="0.1">^\s*FROM\s+\S+</match-content>
+    </detectors>
+
+    <comments>
+        <single>
+            <expression>#</expression>
+        </single>
+    </comments>
+
+    <autoclosing-pairs>
+        <pair open="[" close="]" />
+        <pair open="{" close="}" />
+        <pair open="&quot;" close="&quot;" />
+    </autoclosing-pairs>
+
+    <surrounding-pairs>
+        <pair open="[" close="]" />
+        <pair open="{" close="}" />
+        <pair open="&quot;" close="&quot;" />
+        <pair open="'" close="'" />
+    </surrounding-pairs>
+
+    <injection>
+        <expression>^(docker|dockerfile|containerfile)$</expression>
+    </injection>
+
+    <tree-sitter language="dockerfile">
+        <highlights path="dockerfile/highlights.scm" />
+        <folds path="dockerfile/folds.scm" />
+        <injections path="dockerfile/injections.scm" />
+    </tree-sitter>
+</syntax>