refactor(core): put docs and file names in order

Author: Reversean

packages/core/src/utils/validation.ts

@@ -39,9 +39,10 @@ export function validateContext(context: EventContext | undefined): boolean {
 }
 
 /**
- * Returns true if value is a plain object (not null, array, Date, Map, etc.)
+ * Checks if value is a plain object (not null, array, Date, Map, etc.)
  *
  * @param value - value to check
+ * @returns `true` if value is a plain object, otherwise `false`
  */
 export function isPlainObject(value: unknown): value is Record<string, unknown> {
   return Object.prototype.toString.call(value) === '[object Object]';