[WASM] Add std text implementations

libraries/stdlib/wasm/builtins/kotlin/Char.kt

@@ -141,6 +141,21 @@ public class Char private constructor(public val value: Char) : Comparable<Char>
          */
         public const val MAX_SURROGATE: Char = MAX_LOW_SURROGATE
 
+        /**
+         * The minimum value of a supplementary code point, `\u0x10000`.
+         */
+        public const val MIN_SUPPLEMENTARY_CODE_POINT: Int = 0x10000
+
+        /**
+         * The minimum radix available for conversion to and from strings.
+         */
+        public const val MIN_RADIX: Int = 2
+
+        /**
+         * The maximum radix available for conversion to and from strings.
+         */
+        public const val MAX_RADIX: Int = 36
+
         /**
          * The number of bytes used to represent a Char in a binary form.
          */