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/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]+'