Add very simple docs.

src/module/rolls/check.ts

@@ -8,6 +8,19 @@ interface TermData {
     options: Record<string, unknown>;
 }
 
+/**
+ * Implements DS4 Checks as an emulated "dice throw".
+ *
+ * @notes
+ * Be aware that, even though this behaves like one roll, it actually throws several iones internally
+ *
+ * @example
+ * - Roll a check against a Check Target Number (CTV) of 18: `/r dsv18`
+ * - Roll a check with multiple dice against a CTN of 34: `/r dsv34`
+ * - Roll a check with a racial ability that makes `2` a coup and `19` a fumble: `/r dsv19c2,19`
+ * - Roll a check with a racial ability that makes `5` a coup and default fumble: `/r dsv19c5`
+ * - Roll a check with exploding dice: `/r dsv34x`
+ */
 export class DS4Check extends DiceTerm {
     constructor(termData: Partial<TermData>) {
         super({