Add Makefile and Markdown linter (#73)

* Add Makefile

* Update .gitignore to exclude venv

* Add requirements.txt for venv

* Add pymarkdown lint Github action

* Update .md from lint tool

* Update README with make commands

* Add linter config

docs/Best-Practice.md

@@ -1,18 +1,22 @@
 # Best Practice
+
 This page shows some best practices:
 
-## Camera Placement 
+## Camera Placement
+
 * Move the Camera as close as possible (~4cm), this will help get rid of reflections.
   -> focus can be adjusted by turning the outer black ring of the camera.
 * If the LED reflections are too strong, put tape over the LED to diffuse the light
 * Change the ImageSize to QVGA under "Expert mode" configuration when close enough, this will be faster and is often good enough for digit recognition.
 
 ## Reflections
+
 * Try to get rid of the reflections by rotating the camera, so that the reflections are at positions, where no number is.
 * By using the external LED option, you can place WS2812 LEDs freely away from the main axis.
 * Users report, that a handy cover foil could also help
 
 ## Post-processing
+
 * Filter out the Number "9", as "3" will often be misread for a "9" and void every number between 3 and 9 due to it being negative flow.
 * Split the readings into two, while the decimal numbers might move to fast to be recognized, at least the slower moving part will produce a correct reading.
 -> keep in mind that the offset needs to be adjusted, a.e if you have a comma reading of "3", it needs to become "0.3". This can be done wherever the data ends up being sent, like home assistant using sensor templates.