chain creation

We could have a button somewhere to add a new chain, prompting a prefilled form with the title, trigger..
and then create the file prefilled with a start event:

```
{
"$schema": "./schema.json",
"title": "my new chain",
"cooldown": 999,
"trigger": {
"target": "population",
"comparator": "gte",
"value": 3
},
"events": {
"start": {
"text": "Enter your first event text here"
}
"effects":{}
}
}```

No files, tests, or scripts are named in the issue, so start by locating the chain list/create flow and the file-save logic in the Electron app source. Add a UI action that opens a prefilled form for title/trigger settings and writes a new chain using the provided starter structure. Validate by creating a chain through the app and checking the generated file includes `$schema`, `title`, `cooldown`, `trigger`, and `events.start`. Ensure it is wired into the existing chain storage path used by the project.

Escrito por el modelo de indexación a partir del texto del issue.