feat(crabs): refine rendering for saved crabs policies

[muchvo]

Description

Refine rendering for saved CRABS policies. Now users can seamlessly render and evaluate saved CRABS policies in OmniSafe. See this file for simple usage.

Here is an example for rendering saved CRABS policy which is trained on Swing task.

eval-episode-0.mp4

Episode 0 results:
Episode reward: 22.370796449827267
Episode cost: 0.0
Episode length: 1000.0
Evaluation results:
Average episode reward: 22.370796449827267
Average episode cost: 0.0
Average episode length: 1000.0

Motivation and Context

Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.
You can use the syntax close #15213 if this solves the issue #15213

• I have raised an issue to propose this change (required for new features and bug fixes)

Types of changes

What types of changes does your code introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds core functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (update in the documentation)

Checklist

Go over all the following points, and put an x in all the boxes that apply.
If you are unsure about any of these, don't hesitate to ask. We are here to help!

• I have read the CONTRIBUTION guide. (required)
• My change requires a change to the documentation.
• I have updated the tests accordingly. (required for a bug fix or a new feature)
• I have updated the documentation accordingly.
• I have reformatted the code using make format. (required)
• I have checked the code using make lint. (required)
• I have ensured make test pass. (required)

[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 97.05%. Comparing base (93d4975) to head (7cf39ca).

Files	Patch %	Lines
omnisafe/common/offline/dataset.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #330      +/-   ##
==========================================
+ Coverage   96.83%   97.05%   +0.21%     
==========================================
  Files         138      137       -1     
  Lines        7071     6906     -165     
==========================================
- Hits         6847     6702     -145     
+ Misses        224      204      -20     

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[Gaiejj]

LGTM.