Avoid extending Type from Base on Julia 1.12

For some reason, the internal Flatbuf module defines a function called
`Type`. On Julia 1.12, defining a new function by defining methods is
insufficient to distinguish it from defining new constructor methods for
a visible type of the same name. It's now necessary to forward-declare
the function to ensure it takes precedence over the other visible
binding. Without doing so, `Base.Type` is extended in Flatbuf instead.

Author: ararslan

src/metadata/Schema.jl

@@ -486,6 +486,11 @@ Base.propertynames(x::LargeListView) = ()
 largeListViewStart(b::FlatBuffers.Builder) = FlatBuffers.startobject!(b, 0)
 largeListViewEnd(b::FlatBuffers.Builder) = FlatBuffers.endobject!(b)
 
+# Ensure this binding is distinct from `Base.Type` by forward-declaring it. Otherwise, in
+# Julia 1.12, defining a function called `Type` by simply defining methods ends up actually
+# defining methods for `Base.Type`.
+function Type end
+
 function Type(b::UInt8)
     b == 1 && return Null
     b == 2 && return Int