Refactor project structure (#507)

Cargo.toml

@@ -7,6 +7,10 @@ repository = "https://github.com/raviqqe/bdwgc-alloc"
 license = "MIT"
 categories = ["api-bindings", "memory-management", "no-std", "no-std::no-alloc"]
 
+[workspace]
+resolver = "3"
+members = ["examples/*"]
+
 [dependencies]
 libc = "0.2.178"