`prefer-import/assert-strict`: new rule to prefer import 'node:assert/strict'

[regseb]

There are two imports for asserts:

• import assert from 'node:assert/strict': Strict assertion mode;
• import assert from 'node:assert': Legacy assertion mode that exports 4 functions no longer actively maintained (deepEqual, equal, notDeepEqual and notEqual).

I propose a new rule prefer-import/assert-strict that reports an error when node:assert is imported.