Add trailing comma function support to comma-dangle and prettier config

[ismail-syed]

• comma-dangle will now enforce trailing commas in multi-line function calls via the esnext config. This was previously enforced through our babel config (babel/func-params-comma-dangle) but the rule has been deprecated. We never updated the eslint comma-dangle to reflect the deprecation.

• the trailingComma setting in our prettier config has also been updated the trailingComma option to all. This will also enforce trailing commas in multiline function calls

• Added a .prettierrc file to the project so maintainers can get prettier formatting via editor plugins

[ismail-syed]

@lemonmade, any ideas why CI is failing?
Everything is fine locally, I tried rebuilding without cache too.

Update: had to bump node in CI.