Replaces the old EASYPANEL_WEBHOOK_URL flow with a direct tRPC call
to the panel, using three minimal secrets the operator fills in:
EASYPANEL_TOKEN - bearer token from EasyPanel profile
EASYPANEL_PROJECT_NAME - project name in the dashboard
EASYPANEL_SERVICE_NAME - service name inside that project
The endpoint (https://panelwebsite.moreminimore.com/api/trpc/services.
app.deployService) is hardcoded because the panel URL does not change.
Payload uses tRPC's wrapped-json shape: {"json":{"projectName":...,
"serviceName":...}}.
The build still runs and the dist/ artifact still uploads when any
secret is empty — only the trigger step is skipped with a warning.
Also adds docs/ci-setup.md explaining the three secrets, the service
type requirement (must be 'app' / Dockerfile-based), and a curl recipe
for testing the payload shape locally before pushing.
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