Prepare for Black autoformatting: dependencies, string staging, single-quote string override

setup.cfg

@@ -1,6 +1,13 @@
 [flake8]
 exclude = .git,__pycache__,vendor,.venv,build
-max_line_length = 99
+# match black expectations
+max_line_length = 88
+
+# enforce single quotes
+select = Q0
+docstring-quotes = '''
+multiline-quotes = '''
+
 ignore = X100, E262
 per-file-ignores =
 # Allow crazy line lengths, unused variables, and multiple spaces after commas in lists (for grid alignment)
@@ -11,3 +18,8 @@ per-file-ignores =
 
 [isort]
 known_third_party = analogio,bitbangio,bleio,board,busio,digitalio,framebuf,gamepad,gc,microcontroller,micropython,pulseio,pyb,pydux,uio,ubluepy,machine,pyb,uos
+multi_line_output=3
+include_trailing_comma=True
+force_grid_wrap=0
+use_parentheses=True
+line_length=88