Add documentation for the emerio_pac_125152 component

[MTRNord]

Description:

Adds the documentation for esphome/esphome#9171 which adds support for the emerio PAC-125152 portable air conditioner.

Related issue (if applicable): N/A

Pull request in esphome with YAML changes (if applicable):

• Add initial climate_ir support for the "Emerio PAC 125152" esphome#9171

Checklist:

• I am merging into next because this is new documentation that has a matching pull-request in esphome as linked above.
  or

• I am merging into current because this is a fix, change and/or adjustment in the current documentation and is not for a new component or feature.

• Link added in /components/index.rst when creating new documents for new components or cookbook.

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[MTRNord]

Feedback on format for the extra info would be appreciated. I noticed it isn't the same style as other parts but I am not sure how to bring this info into a similar format.