Throw a meaningful exception if a TypeReference does not use a fully qualified name

[sdeleuze]

TypeReference.of("int") fails because a dot is expected in the type name.

begin 0, end -1, length 3
java.lang.StringIndexOutOfBoundsException: begin 0, end -1, length 3
	at java.base/java.lang.String.checkBoundsBeginEnd(String.java:4601)
	at java.base/java.lang.String.substring(String.java:2704)
	at org.springframework.aot.hint.SimpleTypeReference.createTypeReference(SimpleTypeReference.java:60)
	at org.springframework.aot.hint.SimpleTypeReference.of(SimpleTypeReference.java:48)
	at org.springframework.aot.hint.TypeReference.of(TypeReference.java:75)

[snicoll]

Ignoring the exception, this is the expected behaviour. Fully qualified name is expected as an input here so it should be TypeReference.of("java.lang.int").