Random.Seed doesn't work in the GUI and the TEXT_ONLY tag doesn't do anything so it was incorrectly showing up in the component browser.
This MR makes Random.Seed private to hide it from the GUI and completely removes the TEXT_ONLY tag which is unused and unimplemented.
- Update list of groups to agreed list.
- Lower case `ALIAS` names to be consistent with function names.
- Add `GROUP` to methods.
- All constructors and functions have doc comments.
- Correct a few typos (e.g. `PRVIATE`).
- Mark some more things as `PRIVATE`.
- Use `ToDo:` and `Note:` consistently.
- Order tags in doc comment.
# Important Notes
We don't have all the doc comments on types and will want to add them in future,
1. The metadata objects weren't being duplicated when duplicating
the IR. This meant that the later passes would write metadata
multiples times into one store (reference), causing wrong
behaviour at codegen time.
