Removed "analysis" level from namespace

[niksirbi]

Description

What is this PR

• Bug fix
• Addition of a new feature
• Refactoring

Why is this PR needed?

Closes #320.

The "analysis" folder was unnecessary, because it only contains the kinematics.py module, and it made our import statements unnecessarily long and complicated.

What does this PR do?

I removed the analysis folder, and moved kinematics.py to be a "top-level" module - i.e. instead of movement.analysis.kinematics we have movement.kinematics.

I then searched and replaced .analysis.kinematics with .kinematics, throughout the repo.

References

Related to #327 and #328, but those will be further discussed and tackled separately.

How has this PR been tested?

Existing tests still pass, and docs still build successfully.

Is this a breaking change?

Yes.

Does this PR require an update to the documentation?

Automatically done.

Checklist:

• The code has been tested locally
• [n/a] 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 SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.76%. Comparing base (f7f3b48) to head (4867406).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #333   +/-   ##
=======================================
  Coverage   99.76%   99.76%           
=======================================
  Files          14       14           
  Lines         846      846           
=======================================
  Hits          844      844           
  Misses          2        2           

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[lochhh]

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