Restructure setting obs and act observations and return unique observations

[nick-harder]

-set obs_dim and act_dim as properties of bidding startegies -remove these values from configs -set them as fixed values in startegies -learning role checks if all strategies have the same dimensions -raise an error if not the same dimensions -include unique observations in the critic

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 76.47059% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 77.97%. Comparing base (b9b177a) to head (0d7f435).

Files	Patch %	Lines
assume/reinforcement_learning/learning_utils.py	57.89%	8 Missing :warning:
assume/reinforcement_learning/algorithms/matd3.py	86.95%	3 Missing :warning:
assume/world.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #351 +/- ## ========================================== - Coverage 78.07% 77.97% -0.11% ========================================== Files 43 43 Lines 5090 5116 +26 ========================================== + Hits 3974 3989 +15 - Misses 1116 1127 +11 ``` | [Flag](https://app.codecov.io/gh/assume-framework/assume/pull/351/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=assume-framework) | Coverage Δ | | |---|---|---| | [pytest](https://app.codecov.io/gh/assume-framework/assume/pull/351/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=assume-framework) | `77.97% <76.47%> (-0.11%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=assume-framework#carryforward-flags-in-the-pull-request-comment) to find out more.

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