Add CODE documentation

Author: boriel

docs/code.md

@@ -0,0 +1,32 @@
+#CODE
+
+##Syntax
+
+
+```
+code(<value>)
+```
+
+##Description
+
+Returns the ASCII code of the first character of the given string value.
+If the string is empty, the returned value is 0.
+Returned value type is [UByte](types.md#UByte).
+
+##Examples
+
+```
+REM ASCII CODE of "A"
+PRINT "ASCII CODE of A is "; CODE("A")
+LET a$ = ""
+PRINT "ASCII CODE of emtpy string is "; CODE(a$)
+```
+
+##Remarks
+
+* This function is 100% Sinclair BASIC Compatible
+
+##See Also
+
+* [CHR](chr.md)
+* [STR](str.md)