feat: create blank for the catalog page

[NazarPauk]

Description

Catalog page programming blank

Task Link

Link to Figma

Changes Made

• Created the file catalog.html.
• Added header, intro, and footer blocks
• Used intro_page_catalog and intro__title_page_catalog modifiers for intro and intro__title
• Moved header__navigation-link_active modifier to the corresponding link in the header and removed the href attribute from that link
• In the title tag of catalog.html, wrote "Pink: Фотографии"
• Updated a link to the catalog page in the header of index.html
• Imported styles of the section__intro component to the catalog.css for the future use

Usage

Specify the content of the page within the <main> tag.

<header class="header page__header">
</header>
<main class="page__content">
  <!-- Your code for content -->
</main>
<footer class="footer page__footer">
</footer>

Checklist

Before submitting this pull request, please ensure the following:

• [x] I've validated my HTML with Nu Html Checker, and it outputs no errors
• [x] I've checked my HTML with HTML Tree Generator, and it outputs no errors
• I've ensured that the layout matches the mockup for the following control points:
  • [x] 1200px
  • [x] 660px
  • [x] 320px