add template fan

[ssieb]

What does this implement/fix?

This adds a template fan including adding the necessary triggers to the base fan component.
It also reverts the optional output change from #6274.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

Related issue or feature (if applicable): fixes

Pull request in esphome-docs with documentation (if applicable): esphome/esphome-docs#3655

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040
• BK72xx
• RTL87xx

Example entry for config.yaml:

# Example config.yaml

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.53%. Comparing base (4d8b5ed) to head (d401c47).
Report is 66 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #6310      +/-   ##
==========================================
- Coverage   53.70%   53.53%   -0.18%     
==========================================
  Files          50       50              
  Lines        9408     9507      +99     
  Branches     1654     1680      +26     
==========================================
+ Hits         5053     5090      +37     
- Misses       4056     4110      +54     
- Partials      299      307       +8     

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[nagyrobi]

Will presets of the template fan be independent from speed values?

Eg ability to just have presets like Auto, Manual, independent of speed...

[ssieb]

Everything is independent. You can do whatever you want with the presets. Although I did see that changing any setting resets the preset back to no preset. But that's either HA or the base fan component.

[nagyrobi]

Everything is independent. You can do whatever you want with the presets. Although I did see that changing any setting resets the preset back to no preset. But that's either HA or the base fan component.

Yes that's the problem. Manual is when you'd adjust by hand.
Auto would be when speed would be set by some sensor etc.
And you could of course have some fixed values too as shortcuts.

Don't think it's HA...

[ssieb]

I think presets need a bit of work, but that's not for this PR.

[nagyrobi]

#6112