Add ESMF profiling tool

[minghangli-uni]

The ESMF Profiling 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.

See #38.

[minghangli-uni]

Hi @aekiss , when you are available, could you please review this PR?

[dougiesquire]

@minghangli-uni, what does this do differently than the esmf profiling tools in om3-utils? Is this a replacement for those tools or an extension of them? Or something else?

[minghangli-uni]

esmf profiling tools in om3-utils is more comprehensive but needs the additional package bt2 to process the binary CTF output, while this tool processes text output instead. My vision is that integrating existing visualisation tools (such as Trace Compass) for CTF profiling makes a lot of sense, especially for users who want more intuitive performance analysis. If the goal is quick insights, text-based summaries might be enough. But for detailed performance tuning and debugging, visualisation is a game-changer.