Migrate to ESLint

[ssimek]

First part of the migration to ESLint

• infrastructure work done (replaced packages, configurations, etc.)
• enabled almost all recommend rules, some configuration adjustments were made to fit this project
• fixed all stylistic violations
• most non-stylistic violations are still outstanding

Even though it is a significant change, it is mostly non-functional and can be reviewed commit by commit (most of the commits are limited to violations of just one rule)

[haneefdm]

I am fixing a nasty issue with gdb not doing what is expected. Once I am done with that, I will make push an internal release and then do this merge.