Add performance scaling utils

[minghangli-uni]

Add an ESMF Performance tool to om3-scripts

The ESMF Performance tool is a Python-based tool designed to read and process performance profile data from ESMF profiling log files. It provides a structured way to extract hierachical timing and computational stats for various regions within ESMF runs, enabling detailed performance analysis.

There are two scripts in this tool,

1. esmfFileParser.py

   • Identify and retrieves ESMF profile files from a directory, filtering by the given prefix, and handling both summary and detailed formats.
   • Builds a hierachical tree structure.
   • Extracts performance metrics for specific regions from the parsed data.
   • A high-level function that orchestrates the file, parsing, and analysis run stats for multiple ESMF profiles.

2. esmfRegion.py

   • Defines the ESMFRegion class, which represents individual regions of the ESMF performance data.
   • Maintains the hierachy of the ESMF profile log files, allowing for complex profiling hierachies to be stored and analysed.