Add Change Password feature with form and routing

[gangulel]

This pull request implements a new "Change Password" feature for users, allowing them to request a password reset link directly from their profile. The changes include adding a dedicated password change form, updating navigation flows, and ensuring consistent styling and user experience for the password reset process.

New Password Reset Feature:

• Added a new ChangePasswordForm component that provides a UI for users to request a password reset link. The form is pre-filled and disabled if the user's email is already known, and provides real-time feedback on submission status. The form uses Auth0's password reset endpoint and displays success and error messages as appropriate. (client/src/components/pages/ChangePassword/ChangePasswordForm.jsx, client/src/components/pages/ChangePassword/ChangePasswordForm.jsxR1-R279)
• Created a dedicated route /changePassword in the private routes, protected for authenticated users, which renders the new password reset form. (client/src/routes/PrivateRoutes.jsx, [1] [2]
• Added an export for the ChangePassword component for future use. (client/src/components/pages/ChangePassword/index.js, client/src/components/pages/ChangePassword/index.jsR1)

Navigation and User Experience Improvements:

• Updated the "Change Password" button in the user profile to navigate directly to the new /changePassword route instead of logging out and redirecting to a generic password reset page. This provides a smoother and more secure user experience. (client/src/components/organisms/UserPortal/Userprofile/Userprofile.jsx, client/src/components/organisms/UserPortal/Userprofile/Userprofile.jsxL734-R741)

Styling and UI Enhancements:

• Added a new CSS module to style the password reset page, ensuring it is visually appealing and responsive on both desktop and mobile devices. (client/src/components/pages/ChangePassword/ChangePassword.module.css, client/src/components/pages/ChangePassword/ChangePassword.module.cssR1-R196)

Additional Notes:

• There are two separate implementations for the password reset UI: ChangePassword.jsx (with illustration and CSS module styling) and ChangePasswordForm.jsx (with inline styles and theme support). The route uses ChangePasswordForm.jsx as the main implementation.
• No backend logic was changed; the password reset is handled via Auth0's API.

These changes together introduce a modern, user-friendly way for users to initiate a password reset from within their account portal.

[gangulel]

This pull request introduces a new user password reset flow and improves the user experience for changing passwords. The main changes include adding a dedicated password change page and updating navigation and UI accordingly.

Password Reset Flow Improvements:

• Added a new ChangePasswordForm component that allows users to request a password reset link via email. The form is styled for both light and dark themes and provides feedback for success and error states.
• Integrated the new password reset page into the routing system by adding a protected route for /changePassword in PrivateRoutes.jsx. [1] [2]

UI and Navigation Updates:

• Updated the "Change Password" button in the user profile to navigate directly to the new /changePassword route instead of logging out and redirecting to /forgotpassword.
• Added a CSS module (ChangePassword.module.css) for the new password reset page, providing a modern and responsive design.
• Added an index export for the new ChangePassword page for easier imports.