New Task: Franka Push

[modanesh]

Description

Provides the task of having the Franka arm push a cube to a randomly selected target position, inspired by https://github.com/Yannyehao/Isaac-Lab-Push

Fixes # (issue)

This PR fixes the issue #3545 and discussion https://github.com/isaac-sim/IsaacLab/discussions/437.

Type of change

• New feature (non-breaking change which adds functionality)

Screenshots

A demonstration of the task:

Checklist

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