v4: Social meta tags (#20825)

* descriptions for getting started pages

* descriptions for layout

* add content page descriptions

* more descriptions, updates to some existing ones

* correct site url

* add social stuff to config for twitter cards

* add twitter meta tags; use large image for homepage and regular card for all others

* add the assets

* more site config

* more social shiz to partial, remove existing meta for the partial, remove page title from homepage for simpler if statements

docs/content/code.md

@@ -1,6 +1,7 @@
 ---
 layout: docs
 title: Code
+description: Documentation and examples for displaying inline and multiline blocks of code with Bootstrap.
 group: content
 ---
 

docs/content/figures.md

@@ -1,10 +1,11 @@
 ---
 layout: docs
 title: Figures
+description: Documentation and examples for displaying related images and text with the figure component in Bootstrap.
 group: content
 ---
 
-Anytime you need to display a piece of content—like an image—with an optional caption, consider using a `<figure>`.
+Anytime you need to display a piece of content—like an image with an optional caption, consider using a `<figure>`.
 
 Use the included `.figure` , `.figure-img` and `.figure-caption` classes to provide some baseline styles for the HTML5 `<figure>` and `<figcaption>` elements. Images in figures have no explicit size, so be sure to add the `.img-fluid` class to your `<img>` to make it responsive.
 

docs/content/images.md

@@ -1,6 +1,7 @@
 ---
 layout: docs
 title: Images
+description: Documentation and examples for styling images with Bootstrap.
 group: content
 ---
 

docs/content/reboot.md

@@ -1,6 +1,7 @@
 ---
 layout: docs
 title: Reboot
+description: Documentation and examples for Reboot, Bootstrap's collection of element-specific CSS that builds on Normalize.css.
 group: content
 redirect_from: "/content/"
 ---

docs/content/tables.md

@@ -1,6 +1,7 @@
 ---
 layout: docs
 title: Tables
+description: Documentation and examples for styling tables with Bootstrap.
 group: content
 ---
 

docs/content/typography.md

@@ -1,6 +1,7 @@
 ---
 layout: docs
 title: Typography
+description: Documentation and examples for Bootstrap typography, including global settings, body text, lists, and more.
 group: content
 ---