Media queries: Mention container queries

[mao-sz]

Because

Container queries have now been out long enough that browser support is excellent. There's nothing particularly new to write about concept-wise but it's sensible to introduce the feature for awareness.

This PR

• Adds a brief section introducing container queries
• Adds appropriate LO/KC items
  • LO items shortened to better match the intention of LOs as an overview list of topics in the lesson, instead of learning objectives (as per style guide)

Issue

Closes #30455

Pull Request Requirements

• I have thoroughly read and understand The Odin Project curriculum contributing guide
• The title of this PR follows the location of change: brief description of change format, e.g. Intro to HTML and CSS lesson: Fix link text
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• If this PR addresses an open issue, it is linked in the Issue section
• If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• If any lesson files are included in this PR, they follow the Layout Style Guide