merge note functionality for zkvr

concept of merge note functionality for zkvr
in obsidian, i like to merge notes to help clean things up. it would be good to have this functionality here.
actually, if i just concatenate the 2 files together and delete the old note, the backlinks will update
- need an awk script to combine the related sections
  - read any number of files
  - combine related sections and tags into one
- enrich step will update backlinks in all other files to point to the correct place by reinserting them after the files are merged
any note you want to merge should be linked to the current note. i think that is a reasonable restriction. if you want to merge one quickly, then you can add a link.
when merging, the existing note should come first
one potential issue is that if you end up with duplicate tags, this might break the tag index file
- created script zet/20231121064457/fix-duplicate-tags to remove the duplicate tags on the last line
fix weird broken file
- a weird file was being created because i reused a variable selection in the code. it was important, and reusing it within the code was causing undefined behavior.
2023-11-21 i got this working in zkvr

procedure

select a link to merge into
write to a temp file
call this script to merge the destination readme and the source readme into temp file
remove self references from resulting file
copy temp file to dest readme
set current document to point to dest readme
delete source directory
enrich to update all backlinks

./merge-markdown-related-links ../20230905015223/README.md ../20230916132320/README.md | bat --language=md

zet/20231121064457/README.md