chore: add license

feat: Add RDBENCH_USE_CARTESIAN_PRODUCT option

fix: license

Fixed a bug where initial values were fixed

Add gray-scott model initialization from bitmap

Fix a bug: initialTimeSec in the JSON output.

Fix a bug in phase durations

Add Comm phase and --prettify option

Add the ability to measure the time taken to initialize and finalize

- fix typo
  - wrieTimeSec writeTimeSec
- initialTimSec
  - including MPI_Init
  - Show the slowest of all processes
- finalizeTimeSec
  - including MPI_Finalize
  - Display the time of rank 0 since it is after MPI_Finalize

Fix bugs

- use orderd_json instead of json
- File size was not calculated correctly when -L was large
- When not outputting files, do not display results for writing