Implement justfile watch mode

lua/justfile

@@ -1,11 +1,14 @@
 default:
     @just --list
 
-teal_files := "main.tl framebuffer.tl ringbuffer.tl socket.tl"
+lua_files := `find . -type f -name "*.lua" ! -path './out/*' ! -name tlconfig.lua -printf "%p "`
+teal_files := `find . -type f -name "*.tl" ! -name '*.d.tl' -printf "%p "`
 
 build:
     mkdir -p out
-    cp json.lua out
+    for file in {{lua_files}}; do \
+        cp $file out; \
+    done
     for file in {{teal_files}}; do \
       tl gen $file; \
       mv ${file%.tl}.lua out; \
@@ -16,4 +19,12 @@ alias b := build
 clean:
     rm -r out
     
-alias c := clean
+alias c := clean
+
+watch:
+    while sleep 0.1; do \
+        find . -type f ! -path './out/*' | entr -d just build; \
+        [ $? -eq 0 ] && exit 0; \
+    done
+
+alias w := watch