add isIsoDatetimeRange, minor cleanups in other files

Author: hkong-mitre

index.ts

@@ -26,6 +26,9 @@ export * from "./src/commands/GenericCommand.js";
 export * from "./src/commands/MainCommands.js";
 
 // common
+export * from "./src/common/IsoDate/IsoDate.js";
+export * from "./src/common/IsoDate/IsoDatetime.js";
+export * from "./src/common/IsoDate/IsoDatetimeRange.js";
 export * from "./src/common/IsoDate/IsoDateString.js";
 export * from "./src/common/Json/Json.js";
 export * from "./src/common/comparer/ObjectComparer.js";