Allow setting any config item by environment variable

[fubuloubu]

Describe

For cloud use it's sometimes very handy to be able to set Ape config via environment variables, instead of requiring the file. Some plugins manually ship a version of this by adding extra config settings, but this should probably just be the default for how it works

Specification

All ape core config settings would be under the namespace APE_.
All ape plugin config settings would be under the namespace APE_{plugin_name.upper()}_.

May require some slight breaking change behavior for config items that do not support this type of functionality

https://github.com/ApeWorX/ape/blob/main/src/ape/api/config.py#L72

Dependencies

No response

[linear]

APE-2041

[fubuloubu]

Add this dynamically to every PluginConfig subclass?

    model_config = SettingsConfigDict(
        env_prefix=f"{package.upper()}_",
        case_sensitive=False,
        env_nested_delimiter="_",
        nested_model_default_partial_update=True,
    )