docs: update org name from hykocx to zen and expand DEV guide

- Replace `hykocx` with `zen`/`HYKO` in LICENSE copyright notices
- Update npm registry scope from `@hykocx` to `@zen` in INSTALL.md
- Update npm auth token config path to use `zen` org in DEV.md
- Add project structure overview to DEV.md
- Add contribution standards section referencing GUIDE.md and REDACTION.md
- Add semver versioning bump reference table to DEV.md

LICENSE

@@ -208,8 +208,8 @@ If you develop a new program, and you want it to be of the greatest possible use
 
 To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the “copyright” line and a pointer to where the full notice is found.
 
-     zen
-     Copyright (C) 2026  hykocx
+     ZEN
+     Copyright (C) 2026  HYKO
 
      This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 
@@ -221,7 +221,7 @@ Also add information on how to contact you by electronic and paper mail.
 
 If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
 
-     zen  Copyright (C) 2026  hykocx
+     ZEN  Copyright (C) 2026  HYKO
      This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
      This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.