Support docusaurus (#136)

* Replace {% stuff with Docusaurus stuff

* Saving fixes

* More docusaurus fixes

* Fix link

* Fix core recipe generation

* Fix vars + options

* Fix assertj issues

* Remove auto-generated github pages

Don't see a point for this anymore - and it would be a decent
amount of work to get it working again. We can easily start up
a docusaurus server locally with the changes if we want to see them.

* Make recipes with data tables look better

* Handle more bad recipe names

* Handle C# better

* Fix labeling

I was using title= instead of label= which made capitalization wrong.
I also didn't follow the pattern of fooBar and instead was doing foo-bar.
Both have been fixed

* More style fixes

* Fix recipes with data tables

* Handle HTML better + fix datatables further

* Really fix datatables hopefully

* Handle AI data tables

---------

Co-authored-by: Mike Solomon <mike-solomon@users.noreply.github.com>

src/main/kotlin/org/openrewrite/RecipeDescriptorExtensions.kt

@@ -6,11 +6,11 @@ import org.openrewrite.config.RecipeDescriptor
 fun RecipeDescriptor.asYaml(): String {
     val s = StringBuilder()
     s.appendLine("""
-        ---
-        type: specs.openrewrite.org/v1beta/recipe
-        name: $name
-        displayName: $displayName
-        description: $description
+---
+type: specs.openrewrite.org/v1beta/recipe
+name: $name
+displayName: $displayName
+description: ${description?.replace("\n", " – ") ?: ""}
     """.trimIndent())
     if (tags.isNotEmpty()) {
         s.appendLine("tags:")