v1.5.0: refactor: standardize file naming conventions

- Renamed files to follow consistent naming patterns:
  - bbreadcrumb.go -> breadcrumb.go
  - consts.go -> constants.go
  - nnew.go -> new.go
  - rrow.go -> row.go
- Applied naming changes in both root and v2 directories
- Removed duplicate characters and simplified file names for better readability