Implement getBonusTime in Corporation

Used documentation from other 'getBonusTime' methods

src/NetscriptFunctions/Corporation.ts

@@ -846,5 +846,9 @@ export function NetscriptCorporation(
       const amountShares = helper.number("bribe", "amountShares", aamountShares);
       return bribe(factionName, amountCash, amountShares);
     },
+    getBonusTime: function (): number {
+      checkAccess("getBonusTime");
+      return Math.round(getCorporation().storedCycles / 5) * 1000;
+    }
   };
 }

src/ScriptEditor/NetscriptDefinitions.d.ts

@@ -6651,6 +6651,17 @@ export interface Corporation extends WarehouseAPI, OfficeAPI {
    *
    */
   sellShares(amount: number): void;
+  /**
+   * Get bonus time.
+   * 
+   * “Bonus time” is accumulated when the game is offline or if the game is inactive in the browser.
+   *
+   * “Bonus time” makes the game progress faster.
+   *
+   * @returns Bonus time for the Corporation mechanic in milliseconds.
+   */
+   getBonusTime(): number;
+  
 }
 
 /**