Enable vale for prose linting (#3)

* Enable vale in CI

* Add vale config

* Tweak vale

* Update config

* Update .gitignore

* Switch back

* Rename CI

* Add badges

* Tidy up CI

* Change image

* Configure vale

* Delint

* Update README

.github/styles/proselint/Uncomparables.yml

@@ -0,0 +1,50 @@
+extends: existence
+message: "'%s' is not comparable"
+ignorecase: true
+level: error
+action:
+  name: edit
+  params:
+   - split
+   - ' '
+   - '1'
+raw:
+  - \b(?:absolutely|most|more|less|least|very|quite|largely|extremely|increasingly|kind of|mildy|hardly|greatly|sort of)\b\s*
+tokens:
+  - absolute
+  - adequate
+  - complete
+  - correct
+  - certain
+  - devoid
+  - entire
+  - 'false'
+  - fatal
+  - favorite
+  - final
+  - ideal
+  - impossible
+  - inevitable
+  - infinite
+  - irrevocable
+  - main
+  - manifest
+  - only
+  - paramount
+  - perfect
+  - perpetual
+  - possible
+  - preferable
+  - principal
+  - singular
+  - stationary
+  - sufficient
+  - 'true'
+  - unanimous
+  - unavoidable
+  - unbroken
+  - uniform
+  - unique
+  - universal
+  - void
+  - whole