feat: add initial plot.py module with beast visualization logic

This commit introduces the core plotting module for the beast project, including
the initial implementation of data visualization functions and chart generation
utilities. The module provides the foundational structure for rendering beast-related
metrics and graphical outputs.

ir/ir_gen.h

@@ -0,0 +1,37 @@
+#ifndef RAVA_IR_GEN_H
+#define RAVA_IR_GEN_H
+
+#include "../parser/parser.h"
+#include "../semantic/semantic.h"
+#include "ir.h"
+
+typedef struct RavaLocalVar_t {
+    char *name;
+    size_t index;
+    struct RavaLocalVar_t *next;
+} RavaLocalVar_t;
+
+typedef struct RavaLoopContext_t {
+    int break_label;
+    int continue_label;
+    struct RavaLoopContext_t *parent;
+} RavaLoopContext_t;
+
+typedef struct {
+    RavaProgram_t *program;
+    RavaClass_t *current_class;
+    RavaMethod_t *current_method;
+    RavaSemanticAnalyzer_t *analyzer;
+    int next_local;
+    RavaLocalVar_t *locals;
+    RavaLoopContext_t *loop_context;
+    char *error_message;
+    bool had_error;
+} RavaIRGenerator_t;
+
+RavaIRGenerator_t* rava_ir_generator_create(RavaSemanticAnalyzer_t *analyzer);
+void rava_ir_generator_destroy(RavaIRGenerator_t *generator);
+
+RavaProgram_t* rava_ir_generate(RavaIRGenerator_t *generator, RavaASTNode_t *root);
+
+#endif