Expand material support and checkpoint the completed building toolkit

Expose the runtime block/item registry through compact material search and
single-material descriptions. Preserve private block-entity data through
checked edits and durable undo without sending payloads to model context.

Include the completed terrain tools, isolated world/map plugin, station lift,
ACP streaming and guidance fixes, local camera auto-connect, construction
scripts, and their public documentation, references and verification records.
Active station decoration and private runtime data remain outside this commit.

Validation: 145 Maven tests, 47 Bridge tests, successful camera Gradle build,
and isolated Paper verification of all 1,196 block defaults plus 5,392
independent property cases for placement, same-material edits and restoration.

bridge/test/fixtures/streamed-replies.mjs

@@ -0,0 +1,17 @@
+export const greetingChunks = ['Пр', 'ивет! ', 'Что пост', 'роим?'];
+export const followUpChunks = ['По', 'нятно. ', 'Проверяю ', 'осве', 'щение'];
+export const longReply = 'Осматриваю зал. ' + Array.from({ length: 28 }, (_, i) =>
+  `Арка${i + 1} цела, фонарь${i + 1} 🏮 установлен ровно`
+).join(', ') + '. Проверка завершена';
+export const overlongWord = 'А'.repeat(239) + '🏮'.repeat(150) + 'конец';
+
+export function tokenChunks(text) {
+  const sizes = [2, 3, 7, 4, 11];
+  const chunks = [];
+  for (let offset = 0, i = 0; offset < text.length; i++) {
+    const end = Math.min(text.length, offset + sizes[i % sizes.length]);
+    chunks.push(text.slice(offset, end));
+    offset = end;
+  }
+  return chunks;
+}