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/docs/Foreign.yml

@@ -0,0 +1,11 @@
+extends: substitution
+message: "Use '%s' instead of '%s'."
+ignorecase: true
+level: error
+nonword: true
+action:
+  name: replace
+swap:
+  '\b(?:eg|e\.g\.)[\s,]': for example
+  '\b(?:ie|i\.e\.)[\s,]': that is
+