Add blog to docs (#484)

* Adding social card infrastructure
* Upgrades doc project to .NET 6
* Adds Playwright
* Changes the console to a web project for Playwright
* Adds social card template
* Added blog content
* Parallelized social image processing
* Updating CI to use .NET 6 for docs build

docs/input/prompts/index.cshtml

@@ -1,5 +1,6 @@
 Title: Prompts
-Order: 5
+Order: 60
+Description: "*Spectre.Console* has multiple controls to assist in user input."
 ---
 
 <ul>

docs/input/prompts/multiselection.md

@@ -1,5 +1,10 @@
 Title: Multi Selection
 Order: 3
+Description: "The **MultiSelectionPrompt** can be used when you want the user to select one or many items from a provided list."
+Highlights:
+    - Display multiple items for a user to scroll and choose from.
+    - Custom page sizes.
+    - Provide groups of selectable items.
 ---
 
 The `MultiSelectionPrompt` can be used when you want the user to select

docs/input/prompts/selection.md

@@ -1,5 +1,6 @@
 Title: Selection
 Order: 1
+Description: "The **SelectionPrompt** can be used when you want the user to select a single item from a provided list."
 ---
 
 The `SelectionPrompt` can be used when you want the user to select

docs/input/prompts/text.md

@@ -1,6 +1,12 @@
 Title: Text prompt
 Order: 0
 RedirectFrom: prompt
+Description: "*Spectre.Console* has multiple input functions for helping receive strongly typed input from a user."
+Highlights:
+    - Confirmation.
+    - Strongly typed input.
+    - Input restricted to specific items.
+    - Secrets such as passwords or keys.
 ---
 
 Sometimes you want to get some input from the user, and for this