chore(deps): add HTML entity encoder/decoder

Author: trivikr

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/TypeScriptDependency.java

@@ -75,7 +75,11 @@ public enum TypeScriptDependency implements SymbolDependencyContainer {
 
     // Conditionally added when interacting with specific protocol test bodyMediaType values.
     AWS_SDK_QUERYSTRING_BUILDER("dependencies", "@aws-sdk/querystring-builder", "3.15.0", false),
-    XML_PARSER("dependencies", "fast-xml-parser", "3.19.0", false);
+    
+    // Conditionally added when XML parser needs to be used.
+    XML_PARSER("dependencies", "fast-xml-parser", "3.19.0", false),
+    HTML_ENTITIES("dependencies", "he", "1.2.0", false),
+    TYPES_HTML_ENTITIES("devDependencies", "@types/he", "1.1.1", false);
 
     public static final String NORMAL_DEPENDENCY = "dependencies";
     public static final String DEV_DEPENDENCY = "devDependencies";