Include yaml linting and automatic corrections

[ttmchiou]

Add yamllint and yamlfmt

yamllint serves only for linting yaml and highlighting errors but does not correct
yamlfmt only works on yaml files

https://github.com/jumanjihouse/pre-commit-hook-yamlfmt

[ttmchiou]

@tt-rkim

[ttmchiou]

update here:
yamllint only lints and does not format.
yamlfmt does not use yamllint as a backend so these two are not necessarily compatible after playing around with it a bit.

will try with prettier (which has yaml support) and automatic formatting.

[blozano-tt]

@ttmchiou is this done?

We have yaml-check and yaml-lint in pre-commit ... run on every commit.