feat: add password reset feature test (issue #10)

- Add password-reset.feature with 4 scenarios
- Add step definition for password reset page assertion
- Tests access page, valid email request, invalid email, and empty field

e2e/cucumber/features/password-reset.feature

@@ -0,0 +1,32 @@
+Feature: Password Reset
+  As a user who forgot my password
+  I want to reset my password
+  So that I can regain access to my account
+
+  @happy-path @authentication @issue-10
+  Scenario: User can access password reset page
+    Given I am on the login page
+    When I click the "Forgot password?" link
+    Then I should be on the password reset page
+    And I should see "Reset Password"
+
+  @happy-path @authentication @issue-10 @wip
+  Scenario: User requests password reset with valid email
+    Given I am on the password reset page
+    When I fill in "email" with "existing-user@example.com"
+    And I click the "Send Reset Link" button
+    Then I should see "Password reset link sent"
+    And I should see "Check your email"
+
+  @negative-test @authentication @issue-10 @wip
+  Scenario: User requests password reset with invalid email
+    Given I am on the password reset page
+    When I fill in "email" with "nonexistent@example.com"
+    And I click the "Send Reset Link" button
+    Then I should see an error message
+
+  @negative-test @authentication @issue-10 @wip
+  Scenario: User submits empty email field
+    Given I am on the password reset page
+    When I click the "Send Reset Link" button
+    Then I should see "email is required" error