Closes #70 => this includes reading function for Parmay Matrix devices (bin format), documentation and test files. The function readParmayMatrix processes the header and packet data of bin files, validates data integrity using CRC32 checksums, and outputs structured sensor data and quality check information.

The function is able to read bin files from Parmay Matrix devices with a variety of formats:

• Including accelerometer, gyroscope, temperature, and heart rate sensors, or only some of them
• With different sampling frequencies, options are 12.5, 25, 50, and 100 Hz.

For efficiency, if only the sampling frequency or the accelerometer dynamic range is required (e.g., as in GGIR::inspectfile), then the function stops reading at the moment it has identified these outputs.

Checklist before merging:

• Existing tests still work (check by running the test suite, e.g. from RStudio).
• Added tests (if you added functionality) or fixed existing test (if you fixed a bug).
• Updated or expanded the documentation.
• Updated release notes in NEWS.md with a user-readable summary. Please, include references to relevant issues or PR discussions.
• Added your name to the contributors lists in the DESCRIPTION file, if you think you made a significant contribution.