feat: compute reading measures from event and textstimulus dataframe

[SiQube]

given a EventDataFrame and TextStimulus, compute reading measures.

relies on #852

[codecov]

Codecov Report

Attention: Patch coverage is 8.51064% with 86 lines in your changes missing coverage. Please review.

Project coverage is 97.64%. Comparing base (9073c28) to head (00a07d5).
Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
src/pymovements/reading_measures/frame.py	8.51%	85 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main     #967      +/-   ##
===========================================
- Coverage   100.00%   97.64%   -2.36%     
===========================================
  Files           74       78       +4     
  Lines         3462     3649     +187     
  Branches       622      646      +24     
===========================================
+ Hits          3462     3563     +101     
- Misses           0       85      +85     
- Partials         0        1       +1     

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