feat: added keyword codec (partially works)

testdata/data/complex_front_matter/input.md

@@ -0,0 +1,20 @@
+---
+@type: Book
+name: The Great Book
+author:
+  @type: Person
+  name: Jane Doe
+  email: jane.doe@example.com
+tags:
+  - fiction
+  - adventure
+chapters:
+  - name: Chapter 1
+    pages: 20
+  - name: Chapter 2
+    pages: 30
+---
+
+# The Great Book
+
+This is the content of the great book.

testdata/data/complex_front_matter/output.json

@@ -0,0 +1,26 @@
+{
+  "@context": "https://schema.org",
+  "@type": "Book",
+  "name": "The Great Book",
+  "author": {
+    "@type": "Person",
+    "name": "Jane Doe",
+    "email": "jane.doe@example.com"
+  },
+  "tags": [
+    "fiction",
+    "adventure"
+  ],
+  "chapters": [
+    {
+      "name": "Chapter 1",
+      "pages": 20
+    },
+    {
+      "name": "Chapter 2",
+      "pages": 30
+    }
+  ],
+  "headline": "The Great Book",
+  "articleBody": "This is the content of the great book."
+}

testdata/data/recipe_no_description/output.json

@@ -1,5 +1,6 @@
 {
   "@context": "https://schema.org",
+  "@schema": "Recipe",
   "@type": "Recipe",
   "name": "Simple Salad",
   "image": "https://example.com/salad.jpg",

testdata/data/recipe_salad/input.md

@@ -8,6 +8,7 @@ recipeYield: 2 servings
 ---
 
 # Simple Salad
+#healthy #salad
 
 A quick green salad.
 

testdata/data/recipe_salad/output.json

@@ -1,5 +1,6 @@
 {
   "@context": "https://schema.org",
+  "@schema": "Recipe",
   "@type": "Recipe",
   "name": "Simple Salad",
   "image": "https://example.com/salad.jpg",
@@ -7,6 +8,10 @@
     "@type": "Person",
     "name": "Alex Chef"
   },
+  "keywords": [
+    "healthy",
+    "salad"
+  ],
   "description": "A quick green salad.",
   "prepTime": "PT10M",
   "cookTime": "PT0M",

testdata/data/typo_section_header/input.md

@@ -0,0 +1,14 @@
+---
+@type: Recipe
+name: Typo Recipe
+---
+
+# Typo Recipe
+
+## Ingredints
+- Item 1
+- Item 2
+
+## Stps
+1. Step 1
+2. Step 2

testdata/data/typo_section_header/output.json

@@ -0,0 +1,13 @@
+{
+  "@context": "https://schema.org",
+  "@type": "Recipe",
+  "name": "Typo Recipe",
+  "recipeIngredient": [
+    "Item 1",
+    "Item 2"
+  ],
+  "recipeInstructions": [
+    "Step 1",
+    "Step 2"
+  ]
+}