Add flake8 to project requirements

env.yaml

@@ -6,18 +6,22 @@ dependencies:
   - _openmp_mutex=5.1=1_gnu
   - bzip2=1.0.8=h7b6447c_0
   - ca-certificates=2023.08.22=h06a4308_0
+  - flake8=6.1.0=py311h06a4308_0
   - iniconfig=1.1.1=pyhd3eb1b0_0
   - ld_impl_linux-64=2.38=h1181459_1
   - libffi=3.4.4=h6a678d5_0
   - libgcc-ng=11.2.0=h1234567_1
   - libgomp=11.2.0=h1234567_1
   - libstdcxx-ng=11.2.0=h1234567_1
   - libuuid=1.41.5=h5eee18b_0
+  - mccabe=0.7.0=pyhd3eb1b0_0
   - ncurses=6.4=h6a678d5_0
   - openssl=3.0.12=h7f8727e_0
   - packaging=23.1=py311h06a4308_0
   - pip=23.3.1=py311h06a4308_0
   - pluggy=1.0.0=py311h06a4308_1
+  - pycodestyle=2.11.1=py311h06a4308_0
+  - pyflakes=3.1.0=py311h06a4308_0
   - pytest=7.4.0=py311h06a4308_0
   - python=3.11.5=h955ad1f_0
   - readline=8.2=h5eee18b_0