Corrected various spelling mistakes in comments, documentation, and
variable names across the project. Changes include:
- Documentation files (CONTRIBUTING.md, README.md, etc.)
- Source code comments in C/C++ files
- Function parameter names and descriptions
No functional changes were made.
- moved ultragrid-bugreport-collect.sh to doc (will be bundled automatically)
- moved data/MacOS-bundle-template to data/template (just a move)
- added data/template/README.md
