[FEATURE] Add new option -m for minimal mode

## Is your feature request related to a problem? Please describe

In some cases, a more minimal output is desired without the numbers and count display. This is useful for certain use cases such as piping the output into other commands.

## Describe the solution you'd like

Add a new option `-m` which when included removes the following:
- The count display in the output (i.e. `watching 10 anime`)
- The numerical prefixes for each anime title (i.e `9.`)

The end result should simply be a newline separated list of anime titles.

## Additional context

Please read through the [Contributing to the Project](../../CONTRIBUTING.md) document before working on this project.

Read CONTRIBUTING.md first, then locate the command-line option parsing and the output code that prints the count and numbered anime titles. Add support for -m so the result is only a newline-separated list of titles, and verify both normal and minimal output modes.

Written by the indexing model from the issue text.