docs: integrate Vale for documentation linting (#2242)

* added value rules

* resolved errors raised by vale

* added github action

* fixes to github action

* added details in contribution guidelines

* added rule for numbers

* limited checks to errors

docs/styles/write-good/Illusions.yml

@@ -0,0 +1,11 @@
+extends: repetition
+message: "'%s' is repeated!"
+level: warning
+alpha: true
+action:
+  name: edit
+  params:
+    - truncate
+    - " "
+tokens:
+  - '[^\s]+'