Not sure what I'm doing wrong but can't get this working:

when I run: esphome -v run thermostat-number-minimal.yaml
I get below

INFO Reading configuration thermostat-number-minimal.yaml...
Failed config

opentherm: [source thermostat-number-minimal.yaml:25]

  Component not found: opentherm.
number.opentherm: [source thermostat-number-minimal.yaml:28]

  Platform not found: 'number.opentherm'.
  platform: opentherm
  t_set:
    name: Boiler Control setpoint

Whatever I do, can't get opentherm to be found.

In the same folder as my thermostat-number-minimal.yaml
there is also this tree folder with stuff brought in from git:

.esphome\external_components\e2aecb28\components\opentherm\

So git kinda works to bring in the repo source, but after that don't know why it still complains about opentherm not being found.