[Feat] File output name auto-generation config option

[ruzfyi]

What it is

A set of options in the config to allow the user to choose whether to set up automatic output generation for their files. This, aside from helping distinguish files in the directory, helps the user track down what options were applied to the image and in what order in order to share it with other users or simply replicate it on other images from just the file name.

Additions

• config options: values such as the ones I used in the example below to determine options for enabling/disabling this feature (which should be false by default) as well as overrides to the default format extensions added.
• flag when false: a flag on the CLI for activating the default momentarily if the user needs it for only one specific use
• flag when true: a flag on the CLI to serve when an exception is needed for the opposite effect

Example

Configuration

OutputAutoFormatting: true

UpscaleFormat: "%s-upscaled"
ConvertFormat: "%s-[theme]"
InvertFormat: "%s-inverted"

Command with config

$ gowall upscale image.png

> image-upscaled.png

Command with exception flag

$ gowall upscale image.png --output-exception

> image.png

Command with format flag

$ gowall upscale image.png --output-format

> image-upscale.png

Possible use for modular case (?)

$ gowall upscale image.png --output-format new-name

> new-name-upscaled.png

Note

Not crucial at all. For all intents and purposes this is purely a QOL feature and should be bottom priority over functional features if even considered.