Closes #10193

This pull request refactors error handling in the tail_file function in src/uu/tail/src/tail.rs to use path.metadata() for file checks and improves error reporting formatting.

Error handling and logic improvements:

• Changed file existence and directory checks to use path.metadata(), enabling more robust detection of missing files and directories. This replaces separate checks for existence and directory status with a single match statement.
• Added explicit handling for ErrorKind::NotFound to ensure missing files are reported with the correct error message and observer update, then exit early.

Error reporting formatting:

• Updated error message formatting to use multi-line translate! calls for better readability and consistency across permission and file opening errors.