[Feature] Add coloured labels for common labels about reviews HOT 2 CLOSED

I will take a stab at this

from reviews.

As discussed with @yushao2 in #53 , we have decided to increase the scope of this ticket to include configurable labels and colours to support the wide variety of labels that are non-standard or default.

If no user configuration is provided we should provide a default configuration for common labels and colours

• docker: purple
• security: red,
• python: green,

If a custom configuration is provided we should replace the default configuration with the values provided.

You may find the get_configuration function useful in reviews/config.py as it accepts a comma-separated list of values for REPOSITORY_CONFIGURATION and convert's it to another format: https://github.com/apoclyps/reviews/blob/main/reviews/config.py#L28-L39

For example:

export LABEL_CONFIGURATION="python/green,docker/purple,security:red"

could be converted to one of the supported colours available within https://rich.readthedocs.io/en/latest/_modules/rich/color.html?highlight=green

label_config = {
    "python": "green",
    "docker": "purple",
    "security": "red",
}

then when we apply the labels in

from reviews.