Previous namings in makesdna code was very confusing and inconsistent.
This commit unifies names accross the codebase as such:
- `struct` for the structs definitions data.
- `type` for the types definitions data.
- `member` for the struct members definitions data.
Structs and types definitions are not in synced for two reasons:
- types contains also definitions for basic types (int, float, etc.).
- types can be discovered before their struct definition (as members of
other structs).
This commit also groups all members of `SDNA` struct more logically (all
'structs' ones together, then all 'types' ones, then all 'struct
members' ones).
This commit should have no behavioral change at all.
Pull Request: https://projects.blender.org/blender/blender/pulls/125605
2372bf1377