chore: move lmdbxx submodule under cpp folder

.gitmodules

@@ -2,5 +2,5 @@
 	path = test/cpp/hoytech-cpp
 	url = https://github.com/hoytech/hoytech-cpp.git
 [submodule "test/cpp/lmdbxx"]
-	path = test/cpp/lmdbxx
+	path = cpp/vendor/lmdbxx
 	url = https://github.com/hoytech/lmdbxx.git

cpp/Makefile

@@ -19,7 +19,7 @@ negentropy-cpp:
 	g++ negentropy.h --std=c++20 -o negentropy.o $(INCS)
 
 c-wrapper:
-	g++ negentropy_wrapper.h --std=c++20 -o negentropy_wrapper.o $(INCS) -I../test/cpp/lmdbxx/include/
+	g++ negentropy_wrapper.h --std=c++20 -o negentropy_wrapper.o $(INCS) -I./vendor/lmdbxx/include/
 
-clean: 
-	rm -f negentropy.o
+clean:
+	rm -f negentropy.o

test/cpp/Makefile

@@ -2,7 +2,7 @@ W        = -Wall
 OPT      = -g -O2
 STD      = -std=c++20
 CXXFLAGS = $(STD) $(OPT) $(W) -fPIC $(XCXXFLAGS)
-INCS     = -I../../cpp/ -I./hoytech-cpp/ -Ilmdbxx/include/
+INCS     = -I../../cpp/ -I./hoytech-cpp/ -I../cpp/vendor/lmdbxx/include/ #-I/opt/homebrew/include/ -L/opt/homebrew/lib/
 
 DEPS = ../../cpp/negentropy.h ../../cpp/negentropy/* ../../cpp/negentropy/storage/* ../../cpp/negentropy/storage/btree/*