added User Flow into Sign-In, Sign-Up pages

[OlehDulebaEpam]

Angular. Train-A project: User Flow for Sign-In, Sign-Up pages

Added detailed User Flow into Authorization pages.

🤔 This is a ...

• [ ] 🌟 New task
• [ ] 🌐 New module
• [x] ⚙️ Update to an existing task
• [ ] 🔧 Update to an existing module
• [ ] 🔗 Update or addition of external resources or links
• [ ] 🐛 Fix in a task or related content
• [ ] 🛠 Fix in a module or related content
• [ ] ✏️ Fixed a typo or grammatical error
• [ ] 🔗 Fixed a broken link
• [ ] ❓ Other (specify: ****____****)

Description

• Brief Overview: Added details to the requirements.

Additional Information

• Screenshots/Links:
• [ ] Related Issues:

Checklist

• [x] ✅ I have performed a self-review of my own code.
• [x] 📝 I have commented my code, particularly in hard-to-understand areas.
• [x] 🔧 I have made corresponding changes to the documentation (if applicable).
• [x] 🚫 My changes generate no new warnings or errors.