changes_listener/changes_listener library

1. simplify_satva package
2. documentation
3. changes_listener/changes_listener.dart

simplify_satva package

1. Libraries
2. changes_listener/changes_listener
3. changes_listener/simple_data_helper
4. database/helper/dbhandler
5. database/helper/dbhandler_mysql
6. database/helper/dbhandler_sqlite
7. database/helper/mydbhandler
8. database/pojo/base_pojo
9. database/pojo/database_info
10. database/simple_database
11. database/simple_table_event
12. helpers/animated_route
13. helpers/class_extensions
14. helpers/encryption_helper
15. helpers/env_config
16. helpers/location_helper
17. helpers/network-helper
18. helpers/print_helper
19. helpers/puppeteer-helper
20. helpers/share_helper
21. simplify
22. web/helpers/api_helper
23. web/helpers/mime_list
24. web/helpers/web_service_helper
25. web/localweb/helpers/localweb_sql_helper
26. web/localweb/helpers/no_internet
27. web/localweb/localweb
28. web/localweb/pojo/local_cache
29. web/simple_webrr
30. web/upload_file
31. webview/simple_webview
32. widgets/container
33. widgets/progress_bars
34. widgets/row
35. widgets/simple_lottie
36. widgets/simple_svg
37. widgets/spin_widget