Update return type for rules

Author: nabeelio

README.md

@@ -336,23 +336,43 @@ A rule also has several components:
 
 ### Returning a `RuleValue`
 
-The return value is an tuple, with one mandatory value, and 2 optional values:
+The return value has multiple possible values, sending on
 
+```typescript
+export type RuleValue = undefined | boolean | [string?, number?]
+```
+
+If a rule is passing/hasn't been violated:
+
+```typescript
+return
+return false
+```
+
+If a rule has been violated:
+
+```typescript
+return true
 ```
-RuleValue = [boolean, message, points]
+
+Or, if you want to return a custom message:
+
+```typescript
+return ['message']
 ```
 
+Or, if you want to return a message and points:
+
 ```typescript
-// The true/false MUST be there, it's if the rule was violated or not
-return [true]
+return ['message', points]
+```
 
-// Return a message along with the state. If not set or null, it will
-// use `this.meta.message` as the default
-return [true, message]
+If you want to return just the points, you can return:
 
-// This returns that it was violated, uses the default message, but changes
-// the points returned to -10
-return [true, null, -10]
+```typescript
+return ['', points]
 ```
 
+`points` and `message` are optional - if omitted, they're pulled from the `meta` block
+
 ### Helper Methods

src/rules/example.ts

@@ -22,12 +22,12 @@ export default class ExampleRule implements Rule {
     return Acars.ViolatedAfterDelay(
       this.meta.name,
       this.meta.delay_time,
-      () => {
+      (): RuleValue => {
         if (data.onGround) {
-          return [false]
+          return
         }
 
-        return [true, 'The example was violated!', this.meta.points]
+        return ['The example was violated!', this.meta.points]
       },
     )
   }

src/types/rule.d.ts

@@ -9,16 +9,24 @@ import type { Pirep, Telemetry } from '../types'
  * Return it as a tuple.
  *
  * If a rule is passing/hasn't been violated:
- *  return [false]
- *
+ *    return false
+ *    // or:
+ *    return [false]
+ *a
  * If a rule has been violated:
+ *    return true
+ *    // or, if you want to return a custom message:
+ *    return ['message']
+ *    // or, if you want to return a message and points:
+ *    return ['message', points]
  *
- *  return [true, message, points ]
+ * If you want to return just the points, you can return:
+ *    return ['', points]
  *
  * points and message are optional - if omitted, they're pulled from
  * the 'meta' block
  */
-export type RuleValue = [boolean, string?, number?]
+export type RuleValue = undefined | null | boolean | [string?, number?]
 
 /**
  *