fix: don't autolink pages inside Markdown links

[andreoliwa]

• fixes #15
• use UUIDs instead of manually generated strings

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Hi @sawhney17, I forgot to say a big THANK YOU for this extremely useful Logseq plugin. 🙇🏻‍♂️

I hope you don't mind me changing stuff here and there. 😅 Let me know if you disagree with any modifications (like using UUIDs, for instance). 😉

[sawhney17]

Hey, thanks for all YOUR contributions! You're making the plug-in better than I could've on my own.