add prettier requirements and commands,

add prettier ADR,
add prettier action

specs/adrs/112922-prettier.md

@@ -0,0 +1,17 @@
+# Use Prettier for generic style enforcement
+
+- Status: accept
+- Deciders: Arthur Lu, Marc Reta
+- Date: 11 / 29 / 22
+
+## Decision Drivers
+
+- Other linters (HTML, CSS, JS) are sometimes too permissive
+- Need to enforce style on other files like markdown, json
+
+## Considered Options
+- Prettier
+
+## Decision Outcome
+
+Chosen Option: Prettier