add clean command

scripts/clean.ce

@@ -0,0 +1,51 @@
+// cell clean - Remove build artifacts from modules/
+
+var io = use('io')
+
+log.console(io.searchpath())
+
+if (!io.exists('.cell/build')) {
+  log.console("No build directory found")
+  $_.stop()
+  return
+}
+
+log.console("Cleaning build artifacts...")
+
+// Recursively delete directory contents
+function remove_dir(path) {
+  var files = io.enumerate(path, false)  // non-recursive first
+  
+  // Delete all files and subdirectories
+  for (var i = 0; i < files.length; i++) {
+    var file = files[i]
+    if (io.is_directory(file)) {
+      remove_dir(file)  // Recurse into subdirectory
+    } else {
+      try {
+        io.rm(file)
+      } catch (e) {
+        log.error("Failed to remove " + file + ": " + e)
+      }
+    }
+  }
+  
+  // Now remove the empty directory
+  try {
+    io.rm(path)
+  } catch (e) {
+    log.error("Failed to remove directory " + path + ": " + e)
+  }
+}
+
+// Remove the build directory
+try {
+  remove_dir('.cell/build')
+  log.console("Build directory removed")
+} catch (e) {
+  log.error("Failed during cleanup: " + e)
+}
+
+log.console("Clean complete!")
+
+$_.stop()