Break out symbol handling into Rust

src/symbol.h

@@ -0,0 +1,22 @@
+#ifndef __SYMBOL_H
+#define __SYMBOL_H
+
+#include "stdbool.h"
+#include "inttypes.h"
+// Defined in Rust
+
+struct squeek_symbol;
+
+struct squeek_symbol* squeek_symbol_new(const char *element_name,
+                                        const char *text, uint32_t keyval,
+                                        const char *label, const char *icon,
+                                        const char *tooltip);
+
+
+const char *squeek_symbol_get_name(struct squeek_symbol* symbol);
+const char *squeek_symbol_get_label(struct squeek_symbol* symbol);
+const char *squeek_symbol_get_icon_name(struct squeek_symbol* symbol);
+uint32_t squeek_symbol_get_modifier_mask(struct squeek_symbol* symbol);
+
+void squeek_symbol_print(struct squeek_symbol* symbol);
+#endif