Significant documentation overhaul.

This work is ongoing. Various *.md documents might include broken links and
the publication of the detailed EHS Kernel license information is todo.

- Added `CLAUD.md` to `.gitignore` for people using Claude Code.
- Overhaul of `README.md`.
- Added a new `README.md` to the scripts directory.
- Put lots of licenses into a `licenses` folder and reworked main `LICENSE.md`.
- Added a diagram to the main `README.md` to explain inxware.
- Connected the `README.md` to the new top-level docs:
  - `BUILDING.md`
  - `DEVELOPING.md`
  - `CONTRIBUTING.md`
  - `LICENSE.md`

Author: Steve Revill

.gitignore

@@ -146,3 +146,6 @@ gdb.txt
 
 #build & deploy spam
 ./output.txt
+
+#AI agent config
+CLAUDE.md