Change name of hal functions to ease integration with esphome.

[msteenhuiz]

This is a request to change some hal function names.
Some names have a clash with esphome.
I see workarounds for that.
How open are you to change some hal names to ease integration?
For instance I see in integrations with esp home for home assistant that this can be done only by undefing defines that are used by esphome. It concerns the following:
#undef yield
#undef millis
#undef micros
#undef delay
#undef delayMicroseconds

So I assume that if these names are changed in the hal layer the conflict is gone.
Something like hal_delay or os_delay?

Is that an option?