Docs: Add StackBlitz edit button for examples

Related issues

Closes #36857

Description

This PR suggests to add a StackBlitz edit button for each Bootstrap example.

TODO: add more details to explain the technical solution

Motivation & Context

TODO

Type of changes

• New feature (non-breaking change which adds functionality)

Checklist

• I have read the contributing guidelines
• My code follows the code style of the project (using npm run lint)
• My change introduces changes to the documentation
• I have updated the documentation accordingly

Live previews

• Docs > Examples

Manual tests

For each example, try the StackBlitz edit button and then check if the rendering is the same as within our docs: CSS, JS, etc.

• Album // Album RTL
• Blog // Blog RTL
• Carousel // Carousel RTL
• Cheatsheet // Cheatsheet RTL
• Checkout // Checkout RTL
• Cover
  • ⚠️ Missing .h-100 for html.
• Dashboard // Dashboard RTL
  • ⚠️ Doesn't seem to work because index.js in StackBlitz is executed before the scripts in <script> (index.html)
• Dropdowns
• Features
• Footers
• Grid
• Headers
• Heroes
• Jumbotron
• List groups
• Modals
• Navbar bottom
• Navbar fixed
• Navbar static
• Navbars
• Navbars offcanvas
• Offcanvas navbar
• Pricing
• Product
• Sidebars
• Sign-in
• Starter template
• Sticky footer
  • ⚠️ Can't work because it needs class="h-100" on the html tag which is not possible in StackBlitz since this class is overriden. Do we remove the StackBlitz edit button?
• Sticky footer navbar

Remaining things to do

• Handle 404 errors when using fetch
• Handle extra JS files
• Handle RTL (CSS)
• Handle RTL (JS)
• Check how to handle relative URL like /docs/5.2/assets/brand/bootstrap-logo.svg in the body
• Rebase this branch onto main when https://github.com/twbs/bootstrap/pull/37267 will be merged
• If https://github.com/twbs/bootstrap/pull/37498 is merged, propagate the same modification in this PR
• Remove the bootstrap-bundle.min.js in `