Bug Fix PMT DSP

[theHenks]

This PR contains:

• Updated dsp_pmts function to adapt to new metadata structure
• Used standard SavitzkyGolayFilter instead of WeightedSavitzkyGolay to improve speed
• Bug Fix in IntersectMaximum in case the first sample is already a trigger

CC @MayaMenzel

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 19 lines in your changes missing coverage. Please review.

Project coverage is 30.55%. Comparing base (6d1655b) to head (7b0e97e).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/dsp_pmts.jl	0.00%	18 Missing ⚠️
src/intersect_maximum.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #58      +/-   ##
==========================================
- Coverage   30.65%   30.55%   -0.10%     
==========================================
  Files          24       24              
  Lines        1233     1237       +4     
==========================================
  Hits          378      378              
- Misses        855      859       +4     

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