chore: Enforce a few house rules via eslint (#2539)

src/config/schema/common/string-or-array.ts

@@ -1,5 +1,5 @@
 import { z } from 'zod';
 
-// A value that may be a single string or a list of strings — common across HA
+// A value that may be a single string or a list of strings -- common across HA
 // condition/trigger fields (e.g. `state`, `to`, `entity_id`).
 export const stringOrArray = z.string().or(z.string().array());