Add a rolling mean filter

[ArismitaM]

Description

This PR adds a rolling mean filter to movement.
The mean filter is in line with the median filter and does padding of the time
axis using "reflection".

What is this PR

• Bug fix
• Addition of a new feature
• Other

Why is this PR needed?
This PR adds rolling mean filtering functionality to movement.

What does this PR do?
Adds the ability to smooth a data array using the local mean within a window, whose size is passed as an input parameter.

References

[https://github.com//issues/454](issue #454 )

How has this PR been tested?

A user test program was written which does the following:

• Loads VIA_multiple-crabs_5-frames_labels.csv from the movement sample_data.
• Run mean_filter on the shape and position DataArrays of the loaded dataset
• Members of the smoothed DataArray were randomly verified against the input DataArray and its neighborhood.

Is this a breaking change?

No

Does this PR require an update to the documentation?

Yes. example code base can be augmented to use the mean_filter.

Checklist:

• The code has been tested locally
• Tests have been added to cover all new functionality
• The documentation has been updated to reflect any changes
• The code has been formatted with pre-commit

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.84%. Comparing base (b0676b7) to head (a73f8ef).

Additional details and impacted files

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##             main     #459   +/-   ##
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  Coverage   99.84%   99.84%           
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  Files          23       23           
  Lines        1312     1320    +8     
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+ Hits         1310     1318    +8     
  Misses          2        2           

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