Examples updates (#24898)

* fix cover nav

* Improve signin visuals and alignment with that flexbox love

* rewrite cover example in flexbox

* lighten signin bg

* first pass at pricing example

* redo examples index with data file

* tighten up spacing a bit

* update navbar descriptions

* link pricing

* move that back

* property order

* Fix test errors.

* Compress pricing.png.

* add form validation example

* remove that

* rename that

* restyle and space out

* fix errors

* change order

* cleanup album css and styles

* tweak examples index

* make it a badge

* options

* improve sticky footer alignment

* redesign example index

* brand new blog layout

* start new screenshots

* new product example page a la apple

* add email field

* fix linter, remove unused blog css

* hook up feather icons to start

* redo dashboard

* fix linting

* add floating labels example

* formatting

* formatting

* lint

* fix values on select

* optional input, plus input group

* new dashboard image

* start to reboot the offcanvas example

* updated images

* new offcanvas mostly implemented

* linting

* edit description

* more description changes

* - Add vertical margin to album hero buttons for when they're stacked
- Adjust font-size and padding for pricing header and hero
- Fix checkout's stacked column margins, plus update their check/radio
markup
- Update product's utilities to be responsive
- Made blog cards somewhat responsive (needs a bit more work tbh)

* drop leading zero

* more linting

* swap empty images for holder, fix border

* dist the docs

* navbars have no margin-bottom to begin

* add css var, tweak padding for mobile

* comment headers

* nix commented out code

* nix the navbar structure for a custom one, stack it on mobile

* tweak heading button group for mobile

* Removed narrow jumbotron and justified nav examples as these are easily accomplished with new components in v4

* improve card sizing on pricing

* update and compress

1 files changed, 16 insertions, 0 deletions

diff --git a/_layouts/examples.html b/_layouts/examples.html
new file mode 100644
index 0000000000..768f577fb4
--- /dev/null
+++ b/_layouts/examples.html
@@ -0,0 +1,16 @@
+---
+layout: default
+---
+
+<header class="d-flex flex-column flex-md-row align-items-md-center p-5 bg-light">
+  <div class="pt-md-3 pb-md-4">
+    <h1 class="bd-title mt-0">{{ page.title | smartify }}</h1>
+    <p class="bd-lead">{{ page.description | smartify }}</p>
+    <a href="{{ site.download.source }}" class="btn btn-lg btn-bd-primary" onclick="ga('send', 'event', 'Examples', 'Hero', 'Download');">Download source code</a>
+  </div>
+  {% include ads.html %}
+</header>
+
+<main class="bd-content p-5" role="main">
+  {{ content }}
+</main>