Adding file lock and backup

system/requirements/requirements_colab.txt

@@ -1,5 +1,6 @@
 coqui-tts>=0.24.3
 faster-whisper>=1.0.0
+filelock>=3.16.1
 fuzzywuzzy
 gradio==4.32.2
 importlib_metadata>=7.1.0

system/requirements/requirements_standalone.txt

@@ -1,4 +1,5 @@
 coqui-tts>=0.24.3
+filelock>=3.16.1
 fuzzywuzzy>=0.18.0
 gradio>=4.44.1
 importlib_metadata>=7.2.1

system/requirements/requirements_textgen.txt

@@ -1,4 +1,5 @@
 coqui-tts>=0.24.3
+filelock>=3.16.1
 fuzzywuzzy>=0.18.0
 importlib_metadata>=7.1.0
 inputimeout>=1.0.4