feat: constraints (#409)

enrichment/src/main/kotlin/io/bkbn/kompendium/enrichment/PropertyEnrichment.kt

@@ -1,7 +1,36 @@
 package io.bkbn.kompendium.enrichment
 
+/**
+ * Reference https://json-schema.org/draft/2020-12/json-schema-validation.html#name-multipleof
+ */
 class PropertyEnrichment : Enrichment {
+  // Metadata
   var deprecated: Boolean? = null
   var description: String? = null
   var typeEnrichment: TypeEnrichment<*>? = null
+
+  // Number and Integer Constraints
+  var multipleOf: Number? = null
+  var maximum: Number? = null
+  var exclusiveMaximum: Number? = null
+  var minimum: Number? = null
+  var exclusiveMinimum: Number? = null
+
+  // String constraints
+  var maxLength: Int? = null
+  var minLength: Int? = null
+  var pattern: String? = null
+  var contentEncoding: String? = null
+  var contentMediaType: String? = null
+  // TODO how to handle contentSchema?
+
+  // Array constraints
+  var maxItems: Int? = null
+  var minItems: Int? = null
+  var uniqueItems: Boolean? = null
+  // TODO How to handle contains, minContains, maxContains?
+
+  // Object constraints
+  var maxProperties: Int? = null
+  var minProperties: Int? = null
 }