- The `FileUtils` and `PluginUtils` have been added to provide utility functions.
- The executable and working directory validation has been added to check for existence and missing permissions.
- The `expandPath()` function is removed from `RunCommandService`.
- Working directory will automatically be created if under `TermuxConstants.TERMUX_FILES_DIR_PATH` if missing.
- Better logging has been added. This will later be used to notify the user in foreground.
- Javadocs have been updated.
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