Making baseline not reliant on a line numbers

[ChobotX]

Hi @Humni,

As discussed in this issue, I am trying to make your package not reliant on line numbers.

Instead of hashing filePath, message.line, message.column, and message.ruleId, I hash filePath, message.ruleId, and context for comparison of errors instead.

Context is composed of the file lines (one before the error, the error line, and one after it), trimmed from both sides.

Also, the baseline is sorted by file>ruleId>line in order to make it stable between rebuilds.

Let me know if any changes are needed!

[JasonEleventeen]

I'd suggest copying the way phpstan does this and just count the unique errors/ruleIds per file, this removes the line count completely so headers/comments etc can be changed without issue

example phpstan baseline

		-
			message: "#^Cannot access property \\$id on mixed\\.$#"
			count: 3
			path: app/Console/Commands/CommandIsBroken.php
			
		-
			message: "#^Argument of an invalid type mixed supplied for foreach, only iterables are supported\\.$#"
			count: 1
			path: app/Console/Commands/CommandIsBroken.php
			

[ChobotX]

@JasonEleventeen phpstan was exactly my inspiration, the problem is, that the error messages from eslint are not specific enough. Tried this way and it was not good at all.