feat: Enhance login functionality with additional event emissions

Summary of changes
- Added new event fires to enhance user feedback during the login process.
- Corrected terminology in the documentation for clarity.

- Introduced new event emissions:
  - "second-factor-success" is triggered upon successful second-factor authentication to signal any handlers waiting for this event.
  - "digits-success" fires once the digits button is successfully activated, allowing further actions to be taken.

- Updated the comments in the code to state "digit control" instead of "digits control," improving the grammatical accuracy of the documentation within `openDigits()` method.

source/components/form/login.mjs

@@ -131,6 +131,9 @@ const digitsCollapseSymbol = Symbol("digitsCollapse");
  *
  * @fires login-success
  * @fires redirect-to-first-success-url
+ * @fires second-factor-success
+ * @fires digits-success
+ * @fires monster-login-clicked
  */
 class Login extends CustomElement {
 	/**
@@ -388,7 +391,7 @@ class Login extends CustomElement {
 	}
 
 	/**
-	 * Opens the digits collapse and focuses the digits control.
+	 * Opens the digits collapse and focuses the digit control.
 	 * @returns {Login}
 	 */
 	openDigits() {
@@ -1455,6 +1458,7 @@ function initEventHandler() {
 				if (response.ok) {
 					const timeout = this.getOption("timeoutForSuccess");
 					this[secondFactorButtonSymbol].setState("successful", timeout);
+					fireEvent(this, "second-factor-success");
 					setTimeout(() => {
 						this.openLoggedIn();
 					}, timeout);
@@ -1538,6 +1542,7 @@ function initEventHandler() {
 
 				if (response.ok) {
 					this[digitsButtonSymbol].setState("successful", timeout);
+					fireEvent(this, "digits-success");
 					setTimeout(() => {
 						this.openLoggedIn();
 					}, timeout);