Implement data compression for ADIOS2 snapshots

[ia267]

Current implementation writes uncompressed data, leading to large file sizes that can impact storage requirements

Implementation details:

• Add compression configuration options to the checkpoint namelist - see ADIOS2 docs
• Implement support for different compression methods (ZFP, SZ, MGARD)
• Add lossy vs. lossless compression options with configurable accuracy
• Optimise compression settings for different data types

Acceptance criteria

• Significant reduction in file sizes
• User configurable compression settings via input file
• Minimal impact on I/O performance
• Documentation of compression options and their effects
• Verification that compressed data maintains required accuracy