[linter] Use eslint to lint the javascript files

Summary:
This needs to be installed globally just like prettier.

Only applies to cashtab for now as this is where the config file resides.

Depends on D12923, D12924 and D12925 for the test plan.

Test Plan:

arc lint --everything

Check there is no eslint error

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Subscribers: bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D12926