Add validation message for 'real name' field (#477)

[19AnastasiaTsareva20]

Fix for issue #477

Problem Description
After further investigating issue #477 with displaying long text in user profiles, I discovered that the problem cannot be fully solved by simply adding field validation. Even with validation, long text can still distort the UI due to CSS and HTML limitations for disabled input fields.

Proposed Solution
Instead of limiting text length through validation (which restricts users), I developed a CSS solution that improves the display of any text regardless of its length:

1. Added special div containers for displaying text in view mode
2. Preserved original input/textarea fields for edit mode
3. Applied CSS styles for proper line wrapping and long text display
4. For standard fields, line wrapping is used; for the "About me" field, scrolling with a max height of 200px is implemented

Changes
Modified views/module/user/profile.pug to use div containers in view mode

[kabalin]

Hi, thanks for PR, it is a good start! The real name strings actually exist already in the schema. But adding validation is not sufficient, validation output needs to be passed to client and displayed as error when saving the form.

Please include the screenshot how the error looks like in the UI.

[kabalin]

Why do we need a new field?

Need to rereview

[19AnastasiaTsareva20]

I have made some changes to this update request using a different approach to solving the problem.
I would appreciate it if you have a free minute to check. Thanks!