Exclude unnecessary directory in setup.cfg and added flake8 package in reqirements.txt for locally testing

Author: fungss

requirements.txt

@@ -1,4 +1,4 @@
-distlib==0.3.6
-filelock==3.12.2
-platformdirs==3.8.0
-virtualenv==20.23.1
+flake8==6.1.0
+mccabe==0.7.0
+pycodestyle==2.11.0
+pyflakes==3.1.0

setup.cfg

@@ -1,2 +1,10 @@
 [flake8]
 max-line-length = 120
+exclude = 
+    .git,
+    __pycache__,
+    docs/source/conf.py,
+    old,
+    build,
+    dist,
+    venv