Parse Any HTML-esh Style Tags (#2046)

* tried implementing my own regex

* improves tests

* finally works

* removes prints

* fixed test

* adds start and end

* delete unused imports

* refactored to use new tool

* significantly improved algo

* tag content -> tag attr

* fix tests + adds new field

* return full match

* return remove start and end

* update docstrings

* update docstrings

* update docstrings

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Co-authored-by: Beibin Li <BeibinLi@users.noreply.github.com>
Co-authored-by: Chi Wang <wang.chi@microsoft.com>