Disables extension auto-reload when saving files

[kellyguo11]

Description

Since extensions are now added to the app files, they get automatically reloaded when changes happen in the extension scripts. This feature is most likely not useful for Isaac Lab development workflows. This change disables the hot reload feature as it causes confusion and unnecessary reloading of the modules.

Fixes #1779

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have run the pre-commit checks with ./isaaclab.sh --format
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have updated the changelog and the corresponding version in the extension's config/extension.toml file
• I have added my name to the CONTRIBUTORS.md or my name already exists there

[Mayankm96]

Is this extension specific or we should disable it completely for all the extensions when launching the simulator from Python?

[kellyguo11]

I believe it's a setting we have to add for each extension, seems like it's only available through the extension.toml file.