feat: add fullscreen TUI and project updates

- New TUI screens: Main Menu, Compile, Run, REPL, AI Generator, AI Settings, Help
- AI configuration persisted in ~/.config/cljnim/config.json
- Added illwill dependency for terminal UI
- Updated experiments, examples, docs, and core modules

experiments/native-lib/test_client/Makefile

@@ -0,0 +1,11 @@
+CC = gcc
+CFLAGS = -I../build -L../build
+LDFLAGS = -lmath -Wl,-rpath,'$$ORIGIN/../build'
+
+all: test_client
+
+test_client: main.c
+	$(CC) $(CFLAGS) main.c $(LDFLAGS) -o test_client
+
+clean:
+	rm -f test_client