Add action, reward and obs wrappers

[belerico]

Summary

This PR adds various env wrappers:

• ClipAction
• NormalizeObservationWrapper: inspired by the NormalizeObservation, applies normalization to Dict spaces
• NormalizeReward
• Observation clip: clip the observations in a specified range (only for vector obs)

Type of Change

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• Bug fix (non-breaking change that solves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Other (please describe):

Checklist

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• [x] I have tested my changes locally and they work as expected. (Please describe the tests you performed.)
• [x] I have added unit tests for my changes, or updated existing tests if necessary.
• [x] I have updated the documentation, if applicable.
• [x] I have installed pre-commit and run locally for my code changes.

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