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 and createShellBridge, 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);
```