Add autofix to `no-negated-condition`

Sorry for ignoring the template but nothing applied as this doesn’t actually change the behavior.

Can no-negated-condition be autofixable? It seems “relatively easy” to swap the blocks:

if (!foo) {
	alert('❌')
} else {
	alert('✅')
}

if (foo) {
	alert('✅')
} else {
	alert('❌')
}

Keywords: autofixed auto fix fixed fixable

[bmish]

I’d support a suggestion for this. Perhaps suggestions should be exempt from the stylistic rule freeze:

• Suggestions are a relatively new feature so there are still many existing rules that could benefit from having them added
• All new code for a suggestion is typically confined to the suggestion function and not the rule’s primary code path
• The only behavior change for a suggestion occurs when a user explicitly chooses to accept a suggestion

[mdjermanovic]

I think it makes sense to provide this fix as a suggestion, but given that stylistic rules are frozen, I’m not in favor of adding any new features to no-negated-condition since it is a stylistic rule.