Add requirements.txt file for project dependencies

Added a new requirements.txt file to list the project's essential libraries such as numpy, scipy, pandas, matplotlib, PyQt5, setproctitle, and darkdetect.

requirements.txt

+numpy~=1.24.2
+scipy~=1.10.1
+pandas~=1.5.3
+matplotlib~=3.6.3
+PyQt5~=5.15.9
+setproctitle~=1.3.2
+darkdetect~=0.8.0 ; platform_system == 'Windows'
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