Record line numbers on tokens

[djmattyg007]

Context

I'm writing a tool to parse markdown files and verify that links are valid. To be able to provide the most valuable, accurate feedback, I need to be able to display line numbers to the user, so that they know exactly where in a file the broken link is.

Right now this isn't possible, because line numbers aren't recorded on token objects.

Proposal

Store line numbers on tokens, and provide a convenient wrapper for accessing the line number of a node when using SyntaxTreeNode.

Tasks and updates

No response

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