657 phase 1 simplify type prefixes

[aregtech]

Summary

• Renamed all files with prefix IE, TE and NE.
• Fixed all paths and class names to match the file names;
• Fixed code generator to prevent generating namespace files with prefix NE;
• Fixed example builds;
• Modified functions.cmake file adapting new codegen outputs.

Testing

• build with clang (CMake) and msvc
• run unit tests;
• run some examples.

[x] I have read CONTRIBUTING.md

Signed-off-by: Artak Avetyan

[Copilot]

Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.

[vukihub]

Too many files to review. By first vew it looks fine. Docs are updated.