add cangjie binding (#117)

cangjie/c-src/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.5)
+
+project(ruapu)
+
+include_directories(../../)
+
+
+add_library(ruapu 
+    ruapu-binding.c
+)

cangjie/c-src/ruapu-binding.c

@@ -0,0 +1,14 @@
+#define RUAPU_IMPLEMENTATION
+#include "ruapu.h"
+
+void ruapu_init_c() {
+    ruapu_init();
+}
+
+int ruapu_supports_c(const char* isa) {
+    return ruapu_supports(isa);
+}
+
+const char* const* ruapu_rua_c() {
+    return ruapu_rua();
+}