add web folder to native

dart_filament/native/web/replace_in_file.cmake

@@ -0,0 +1,14 @@
+file(READ ${INPUTFILE} INPUT_TEXT)
+
+foreach(TO_REPLACE_STRING ${TO_REPLACE})
+
+    #get the index of the current to_replace string
+    list(FIND TO_REPLACE ${TO_REPLACE_STRING} REPLACE_INDEX)
+    
+    #look up the corresponding replacement string
+    list(GET REPLACEMENT ${REPLACE_INDEX} REPLACEMENT_STRING)
+
+    string(REPLACE ${TO_REPLACE_STRING} ${REPLACEMENT_STRING} INPUT_TEXT "${INPUT_TEXT}")
+endforeach()
+
+file(WRITE ${OUTPUTFILE} "${INPUT_TEXT}")