[feature] change most of the "warn" rules in eslint-config to "off", create eslint-config-strict pack

[SuperOleg39]

Motivation

Most of the time we just ignore "warn" rules.
If the rule is really important, it is better to prefer "error", otherwise we can just skip this rule.

Solution

Changing all "warn" to "error" - it is a breaking change, so I propose that we can turn off most of warnings, and create another package with more strict rules.