Add functionality to save/load parameter presets in GUI with custom file extension and validation

[kernelshreyak]

Summary

Enhance the parameter control GUI to support saving the current parameters as a preset and loading them from a file.

Requirements

• Add option in the parameter control GUI to save the current parameters as a preset.
• Presets should be saved as plain text files using a custom file extension (suggested: .pgsp - Plant Growth Simulation Preset).
• Implement a file filter in the load dialog to allow only .pgsp files to be selected.
• Include validation logic when loading a preset file to ensure file integrity and correct format before applying parameters.
• Provide user feedback for invalid or corrupted preset files.

Acceptance Criteria

• Users can save the current parameters to a .pgsp file through the GUI.
• Users can load parameters from a .pgsp file via the GUI.
• Only .pgsp files are shown in the open dialog for loading presets.
• An error message is displayed if an invalid or corrupted preset file is loaded.

Notes

• The .pgsp extension is suggested for clarity, but open to alternatives.
• Validation should prevent partial or erroneous parameter application.
• Consider including version or checksum information in the preset file for future compatibility.