fix: iOS links

[szydlovsky]

Summary

Firstly, it turns out that something in the internal implementation of attribute:atIndex:longestEffectiveRange:inRange has been changed and if no attribute has been found, longest effective range is set to whole range we are searching in. This resulted in links wrongly returning that their range is whole input and it had implications in fonts and foreground colors randomly breaking when applying links.

Secondly, improved detecting links. The detection made after updating an automatic link didn't take recently emitted link into consideration and ran the event even if the automatic link wasn't updated - resulting in a double emit. The text when applying link was also double emitted because LinkStyle's addLink redundantly called anyTextMayHaveBeenModified

Test Plan

• To check the first issue, apply a manual link via link editor while having some inline code and blockquotes in the input. See that their styling is stil intact.
• For the second one just add an automatic link and see no double emitting in console.

Screenshots / Videos

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Compatibility

OS	Implemented
iOS	✅
Android	❌(doesn't apply)