feat: implement organization password update functionality

[AliRana30]

Description

Transformed the static "Passwords" page in the Organization settings into a fully functional feature. Previously, the page provided the UI shell but lacked the logic to handle password changes.

Technical Implementation:

• Added useState for managing input fields: oldPassword, newPassword, and confirmPassword.
• Implemented client-side validation, ensuring all fields are filled, new passwords match, and meet the minimum character requirement (6 characters for Firebase Auth).
• Integrated the Firebase reauthenticateWithCredential logic, which is a security requirement for password updates in Firebase.
• Used user.updatePassword to securely persist the changes in the authentication backend.
• Added a Snackbar with a Material-UI Alert to provide success and error notifications, and a CircularProgress indicator to give visual feedback during the update process.

Related Issue

Refers to issue #317

Motivation and Context

This update completes the security settings for organizations. It solves the issue where users were presented with a non-functional form, ensuring that organizations can manage their account security directly from the dashboard.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• Functional testing performed locally using Firebase Auth.