feat(schematics): add schematic search/build with Playwright browser support

Switch Docker base image from node:22-alpine to Playwright Noble for
in-container Chromium support. Add persistent cache volume for schematics.
New files: schematics browser, cache, Java block ID mapping.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/block-map.js

@@ -1,4 +1,5 @@
 import { log } from './utils.js';
+import { JAVA_TO_BEDROCK } from './java-block-ids.js';
 
 const TAG = 'BlockMap';
 
@@ -615,6 +616,13 @@ export function resolveBlock(gcId, gcName) {
     }
   }
 
+  // Try Java string ID (for prismarine-schematic sources)
+  const javaId = gcId?.replace(/^minecraft:/, '');
+  if (javaId && JAVA_TO_BEDROCK.has(javaId)) {
+    const entry = JAVA_TO_BEDROCK.get(javaId);
+    return { block: entry.bedrock, data: entry.data, matched: true, name: entry.name };
+  }
+
   // Try name-based lookup
   if (gcName) {
     const lower = gcName.toLowerCase().trim();