feat(bankai): bankai v10 — the isomorphic compiler & server on Vite 8

One command, zero config, and only the client ever bundles: v8 server
code is plain ESM that Node runs as-authored, so there is no server
build to rot (the lesson of v9).

- start: Vite middleware mode + HMR with per-request streaming SSR via
  ssrLoadModule; a virtual client entry generates the browser glue so
  the user writes exactly one isomorphic module (plan decision D5).
- build: client bundle via Vite 8/Rolldown, manifest-derived route
  assets in dist/bankai.json, service worker built with the precache
  list injected (choo-service-worker convention, manifest edition),
  brotli+gzip precompression of every text asset.
- serve: immutable caching + precompressed negotiation for hashed
  assets, 103 Early Hints (res.writeEarlyHints) with the route's assets
  before every page, streaming SSR, and a window.initialState tail with
  script-breakout-safe serialization and choo internals filtered out.
- inspect: raw/gzip/brotli size report.

Integration tests drive the real counter example through build and
serve, asserting the 103 interim response at the HTTP level.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014NgfSjHE11oFpoSnLVKLXd

packages/bankai/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "bankai",
+  "version": "10.0.0-dev",
+  "description": "The isomorphic choo compiler & server: one command, streaming SSR, zero config",
+  "type": "module",
+  "bin": {
+    "bankai": "./cli.js"
+  },
+  "exports": {
+    ".": "./index.js"
+  },
+  "files": [
+    "cli.js",
+    "index.js",
+    "lib"
+  ],
+  "engines": {
+    "node": ">=24"
+  },
+  "dependencies": {
+    "vite": "^8.0.0"
+  },
+  "repository": "choojs/choo",
+  "keywords": [
+    "choo",
+    "bankai",
+    "ssr",
+    "streaming",
+    "compiler"
+  ],
+  "license": "MIT"
+}