Infers the project name by calculating the relative path from workspace root to project root. Useful for automatically determining which project is being worked on.
get_prj_name()Character string with the project name (e.g., "A" for `projects/A`), or `NULL` if no project is found or project is at workspace root.
This function finds the workspace and project roots, then extracts the project identifier from the relative path. For a standard layout with `projects/A`, returns "A".