Removed incremental API, fixes for operator__validation, added formatting pass on generated files

Decided not to support the incremental API, its not necessary as the ergonomics are not that big a deal.

Got operators to pass the sanity base cases, which means now all upfront constructors pass the base cases!

Next up is getting it to pass the array container generation.

singleheader/gen/Readme.md

@@ -0,0 +1,5 @@
+# Singleheader generator
+
+This will require the scanner to be implemented before it can be done properly.
+
+

singleheader/genc.refactor

@@ -1,4 +0,0 @@
-// Removes the genc_ namespace if desired
-
-namespace genc_
-