This commit introduces the initial framework for a medical simulation library.
It adds a `Patient` struct to hold vital signs, including:
- Blood Pressure (Systolic and Diastolic)
- Heart Rate
- Respiration Rate
- Body Temperature
- Oxygen Saturation
It also includes:
- An `initializePatient` function to create a patient with baseline healthy vitals.
- A placeholder `updatePatient` function for future simulation logic.
- An updated example to demonstrate the new functionality.
- Rename all files, directories, and internal project names to "MedicalLib".
- Replace the generic `add` function with a more domain-specific `calculateBMI` function as an initial example of the library's capabilities.
- Update the `AGENTS.md` file to describe the new purpose and scope of the MedicalLib library.