host: process table, shell, coreutils and harness (T8, T9)

T8: sausage:process WIT (spawn, wait, kill), one store per process over the
shared root, /proc/processes, /run, pipeline and cancellation groups, Exec.
brush and 78 uutils commands; the shared cwd-init object sets the cwd from PWD
and keeps numeric exit codes. The corpus matches native bash.

T9: V8 (deno_core) runs pi-durable, pi-ai and chord; SQLite storage in
<dir>/host/harness.sqlite (WAL, synchronous=FULL); file tools on the VFS, bash
through Exec; resumes after SIGKILL.

host/js/package.json

@@ -0,0 +1,11 @@
+{
+  "private": true,
+  "type": "module",
+  "scripts": { "bundle": "esbuild main.ts --bundle --format=esm --platform=browser --outfile=bundle.js && esbuild test.ts --bundle --format=esm --platform=browser --outfile=test-bundle.js" },
+  "dependencies": {
+    "@earendil-works/pi-durable": "1.5.0",
+    "@earendil-works/pi-ai": "1.5.0",
+    "@earendil-works/chord": "1.5.0"
+  },
+  "devDependencies": { "esbuild": "0.28.2" }
+}