Add support for rendering Bytes values with YamlRenderer (#1276)

pkl-core/src/test/files/LanguageSnippetTests/input/api/yamlRenderer2.yml.pkl

@@ -18,6 +18,9 @@ res13 = new Dynamic { name = "pigeon"; age = 30 }
 res14 = new Person { name = "pigeon" }
 res15 = null
 res16 = Pair(1, 2)
+res17 = Bytes()
+res18 = Bytes(1, 2, 3)
+res19 = IntSeq(0, 127).toList().toBytes()
 
 output {
   renderer = new YamlRenderer {

pkl-core/src/test/files/LanguageSnippetTests/input/api/yamlRenderer3.yml.pkl

@@ -18,6 +18,7 @@ res13 = new Dynamic { name = "pigeon"; age = 30 }
 res14 = new Person { name = "pigeon"; age = 30 }
 res15 = null
 res16 = Pair(1, 2)
+res17 = Bytes(1, 2, 3)
 
 output {
   renderer = new YamlRenderer {
@@ -38,6 +39,7 @@ output {
       [Null] = (it) -> "converted"
       [Pair] = (it) -> "converted"
       [IntSeq] = (it) -> "converted"
+      [Bytes] = (it) -> "converted"
     }
   }
 }

pkl-core/src/test/files/LanguageSnippetTests/output/api/yamlRenderer2.yml

@@ -37,3 +37,6 @@ res15: String
 res16:
 - 2
 - 3
+res17: !!binary ''
+res18: !!binary AQID
+res19: !!binary AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4OTo7PD0+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6e3x9fn8=

pkl-core/src/test/files/LanguageSnippetTests/output/api/yamlRenderer3.yml

@@ -13,3 +13,4 @@ res13: converted
 res14: converted
 res15: converted
 res16: converted
+res17: converted