Add set to compiler

src/compiler.h

@@ -3,3 +3,16 @@
 
 char* compileGroundProgram(GroundProgram* program);
 [[noreturn]] void runtimeError(GroundRuntimeError error, char* what, GroundInstruction* where, int whereLine);
+
+typedef struct VariableInfo {
+    char name[256];
+    int offset;
+} VariableInfo;
+
+typedef struct VariableTable {
+    VariableInfo* vars;
+    size_t count;
+    size_t capacity;
+} VariableTable;
+
+