Update issue templates

.github/ISSUE_TEMPLATE/standard-template.md

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+---
+name: Standard Template
+about: Use https://github.com/NVlabs/curobo/discussions if it's not a bug
+title: ''
+labels: ''
+assignees: balakumar-s
+
+---
+
+If it’s not a bug, please use discussions: https://github.com/NVlabs/curobo/discussions
+
+Please provide the below information in addition to your issue:
+
+1. cuRobo installation mode (choose from [python, isaac sim, docker python, docker isaac sim]):
+2. python version:
+3. Isaac Sim version (if using): 
+
+
+------
+Issue Details