gitigore: simplify coc ignores

.gitignore

-/config/coc/extensions/coc-xml-data/
-/config/coc/extensions/db.json
-/config/coc/extensions/node_modules
-/config/coc/list-diagnostics-history.json
-/config/coc/list-location-history.json
-/config/coc/memos.json
-/config/coc/mru
+# Coc
+/config/coc/*
+!/config/coc/extensions
+/config/coc/extensions/*
+!/config/coc/extensions/package.json
+!/config/coc/extensions/yarn.lock
 
-/local/bin/diff-highlight
+# binaries
+/local/bin/*
 
+# Vim explorer history
 /vim/.netrwhist