Add frontmatter to various auto-gen docs

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

@@ -329,7 +329,12 @@ class RecipeMarkdownGenerator : Runnable {
         // Write recipes-with-data-tables.md
         val recipesWithDataTablesPath = outputPath.resolve("recipes-with-data-tables.md")
         Files.newBufferedWriter(recipesWithDataTablesPath, StandardOpenOption.CREATE).useAndApply {
-            writeln("# Recipes with Data Tables\n")
+            writeln("""
+                ---
+                description: An autogenerated list of all recipes that contain a unique data table.
+                ---
+            """.trimIndent())
+            writeln("\n# Recipes with Data Tables\n")
 
             //language=markdown
             writeln("_This doc contains all of the recipes with **unique** data tables that have been explicitly " +
@@ -388,6 +393,10 @@ class RecipeMarkdownGenerator : Runnable {
             //language=markdown
             writeln(
                 """
+                ---
+                description: An autogenerated table with the latest version of each OpenRewrite module. Updates on an OpenRewrite release.
+                ---
+
                 # Latest versions of every OpenRewrite module
 
                 OpenRewrite's modules are published to [Maven Central](https://search.maven.org/search?q=org.openrewrite).
@@ -462,7 +471,12 @@ class RecipeMarkdownGenerator : Runnable {
         val moderneRecipesPath = outputPath.resolve("moderne-recipes.md")
 
         Files.newBufferedWriter(moderneRecipesPath, StandardOpenOption.CREATE).useAndApply {
-            writeln("# Moderne Recipes\n")
+            writeln("""
+                ---
+                description: An autogenerated list of recipes that are exclusive to Moderne.
+                ---
+            """.trimIndent())
+            writeln("\n# Moderne Recipes\n")
 
             writeln("This doc includes every recipe that is exclusive to users of Moderne. " +
                     "For a full list of all recipes, check out our [recipe catalog](https://docs.openrewrite.org/recipes). " +