Update branch from main

[jorpppp]

• 210 Changes to xtevent helpfile, enable abbreviations

• 210 Changes to other helpfiles

• 214 Change ci default style to p1 (#215) (#216)

• 210 add link to impute note

• 210 minor edit

• 210 minor edit to acknowledgements

• 210 minor clarification

• 210 update description of impute

• "#210 revert previous commit"

This reverts commit 824b61681e2e18c9944fe248294841d8b3160457.

• 210 update impute note

• 210 revert minor unintended changes

• 210 docs to create impute note

• 210 #213 Delete issue folder

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