Add NUFLI image pipeline

- Add mufflon C source (gitignored, auto-downloaded by make)
- Add tools/nuf_to_asm.py for converting .nuf to oscar64 assembly
- Add Makefile targets: nufli, nufli-clean, ensure-mufflon
- Generate NUFLI .asm/.h files for all 5 screens
- Add NUFLI integration plan to tasks.md

src/data/nufli/screen_title.h

@@ -0,0 +1,12 @@
+/* NUFLI image data - generated by nuf_to_asm.py */
+#ifndef SCREEN_TITLE_H
+#define SCREEN_TITLE_H
+
+/* NUFLI data size: 23040 bytes */
+extern const unsigned char nufli_data[23040];
+extern const unsigned int nufli_size;
+
+/* Display NUFLI image */
+void nufli_display(void);
+
+#endif

src/data/nufli/screen_waiting1.h

@@ -0,0 +1,12 @@
+/* NUFLI image data - generated by nuf_to_asm.py */
+#ifndef SCREEN_WAITING1_H
+#define SCREEN_WAITING1_H
+
+/* NUFLI data size: 23040 bytes */
+extern const unsigned char nufli_data[23040];
+extern const unsigned int nufli_size;
+
+/* Display NUFLI image */
+void nufli_display(void);
+
+#endif

src/data/nufli/screen_waiting_2.h

@@ -0,0 +1,12 @@
+/* NUFLI image data - generated by nuf_to_asm.py */
+#ifndef SCREEN_WAITING_2_H
+#define SCREEN_WAITING_2_H
+
+/* NUFLI data size: 23040 bytes */
+extern const unsigned char nufli_data[23040];
+extern const unsigned int nufli_size;
+
+/* Display NUFLI image */
+void nufli_display(void);
+
+#endif

src/data/nufli/screen_win_hare.h

@@ -0,0 +1,12 @@
+/* NUFLI image data - generated by nuf_to_asm.py */
+#ifndef SCREEN_WIN_HARE_H
+#define SCREEN_WIN_HARE_H
+
+/* NUFLI data size: 23040 bytes */
+extern const unsigned char nufli_data[23040];
+extern const unsigned int nufli_size;
+
+/* Display NUFLI image */
+void nufli_display(void);
+
+#endif

src/data/nufli/screen_win_scoot.h

@@ -0,0 +1,12 @@
+/* NUFLI image data - generated by nuf_to_asm.py */
+#ifndef SCREEN_WIN_SCOOT_H
+#define SCREEN_WIN_SCOOT_H
+
+/* NUFLI data size: 23040 bytes */
+extern const unsigned char nufli_data[23040];
+extern const unsigned int nufli_size;
+
+/* Display NUFLI image */
+void nufli_display(void);
+
+#endif