Generate one file per XDR type (#520)

* generate one file per type instead of one big file

* group ifdef/else definitions into same file

* remove redundant cfg from mod/pub use lines

* move generated/mod.rs to generated.rs

* allow clippy::wildcard_imports in generated code

* makefile wildcard

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Revert "makefile wildcard"

This reverts commit 73b3da3.

* use find for rustfmt to avoid glob expansion issues

* add blank line after use import in generated files

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: leighmcculloch

Makefile

@@ -43,7 +43,7 @@ src/generated.rs: $(sort $(wildcard xdr/*.x))
 		--output $@ \
 		--custom-default $(CUSTOM_DEFAULT_IMPL) \
 		--custom-str $(CUSTOM_STR_IMPL)
-	rustfmt $@
+	rustfmt $@ && find src/generated -name '*.rs' | xargs rustfmt
 
 xdr-version: $(wildcard .git/modules/xdr/**/*) $(wildcard xdr/*.x)
 	git submodule status -- xdr | sed 's/^ *//g' | cut -f 1 -d " " | tr -d '\n' | tr -d '+' > xdr-version
@@ -54,6 +54,7 @@ xdr-json: src/generated.rs
 
 clean:
 	rm -f src/generated.rs
+	rm -rf src/generated
 	rm -f xdr-version
 	rm -fr xdr-json
 	cargo clean --quiet