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/CorporateSpeak.yml

@@ -0,0 +1,30 @@
+extends: existence
+message: "'%s' is corporate speak."
+ignorecase: true
+level: error
+tokens:
+  - at the end of the day
+  - back to the drawing board
+  - hit the ground running
+  - get the ball rolling
+  - low-hanging fruit
+  - thrown under the bus
+  - think outside the box
+  - let's touch base
+  - get my manager's blessing
+  - it's on my radar
+  - ping me
+  - i don't have the bandwidth
+  - no brainer
+  - par for the course
+  - bang for your buck
+  - synergy
+  - move the goal post
+  - apples to apples
+  - win-win
+  - circle back around
+  - all hands on deck
+  - take this offline
+  - drill-down
+  - elephant in the room
+  - on my plate