Function createKernl

createKernl(options: KernlOptions): Kernl
Compose the shell: one EventStore, one RelayPool, one AccountManager, the relay tiers, the guard pipeline, the grants layer, the messaging and bridge registries, kehto's services (intents included) and createShellBridge, the applet store's catalogue, plus the applet lifecycle decodePointer → resolve → plan → mount.

Anything the host passes in options is used as is; anything missing is created with kernl's defaults. The host wires handleWindowMessage to the window once and supplies the frames; everything else is reached through KernlHost.
Parameters
- options: KernlOptions
  Host hooks and optional pre-built parts.
Returns Kernl
The shell.
Example
```
const kernl = createKernl({ host });
window.addEventListener('message', (event) => kernl.handleWindowMessage(event));
const summary = await kernl.resolve(kernl.decodePointer(address));
const handle = kernl.mount(await kernl.plan(summary), iframe);
```