JSON Schema to GBNF integration tests (ggml-org#7790)

* Adding simple bare-bones test for end-to-end integration test for json validation against auto-generated JSON-schema grammars.

* Adding additional examples as documented in ggml-org#7789 . Also adding the ability to automatically output improperly failing grammars to debug output files so they can more easily be examined in the gbnf-validator program.

* Uncommenting formerly commented tests so that they fail for others who are attempting to reproduce the bugs.

* Merging improved schema test methods added by @ochafik in ggml-org#7797

* Adding #define to temporarily remove failing tests so that this PR can pass CI, but still be useful for other PRs that want to leverage the framework.

* Fixing nits from ochafik. Removing escape slashes, adding additional failing cases, fixing some other strings.

* Fixing grammar indentation to be consistent throughout file.

Author: HanClinto

Makefile

@@ -1051,7 +1051,7 @@ tests/test-grammar-parser: tests/test-grammar-parser.cpp ggml.o llama.o grammar-
 	$(CXX) $(CXXFLAGS) -c $< -o $(call GET_OBJ_FILE, $<)
 	$(CXX) $(CXXFLAGS) $(filter-out %.h $<,$^) $(call GET_OBJ_FILE, $<) -o $@ $(LDFLAGS)
 
-tests/test-grammar-integration: tests/test-grammar-integration.cpp ggml.o llama.o grammar-parser.o $(OBJS)
+tests/test-grammar-integration: tests/test-grammar-integration.cpp json-schema-to-grammar.o ggml.o llama.o grammar-parser.o $(OBJS)
 	$(CXX) $(CXXFLAGS) -c $< -o $(call GET_OBJ_FILE, $<)
 	$(CXX) $(CXXFLAGS) $(filter-out %.h $<,$^) $(call GET_OBJ_FILE, $<) -o $@ $(LDFLAGS)