Add Constraints on Passwords in Sign Up page

[PedroCo3lho]

Detailed Information

This pull request introduces password validation functionality to the signup page, ensuring that passwords meet specific security requirements. The changes include the addition of a new utility function for password validation and updates to the signup page to incorporate this validation.

Password validation functionality:

• landing_page/src/app/lib/utils/RegEx.ts: Added an enumeration PasswordRequirement for the different password criteria, a type TPasswordValidationResult for the validation result, and a function validatePassword to check if a password meets the specified requirements.

Updates to the signup page:

• landing_page/src/app/signup/page.tsx: Imported the validatePassword function and TPasswordValidationResult type.
• landing_page/src/app/signup/page.tsx: Added state passwordValidation to store the password validation result and updated the handleSubmit function to show an error if the password does not meet the requirements.
• landing_page/src/app/signup/page.tsx: Updated the handleInputChange function to validate the password whenever it is changed.
• landing_page/src/app/signup/page.tsx: Added a list to display unmet password requirements below the password input field.

Related Issues

Closes #277

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Type of Change

• 🐛 Bug fix or ⚙️ enhancement
• ✨ New feature or Chore (change with no new features or fixes)
• 📚 Documentation update

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Checklist (select as many as applicable)

• The code follows the style guidelines of this project.
• All new and existing tests pass.
• This pull request is ready to be merged and reviewed.