Rename the `default` feature to `base` about pixi

[ruben-arts]

I don't think the environment should be named base as it is not acting as a basis for any other environment, because you can override it to be the most inclusive environment. e.g. default = {features = ["test", "dev", "cuda"], solve-group = "default"}.

However, this change would make more sense to me for the default feature. This is used as a basis for all environments and has to be deactivated by adding no-default-feature which could be no-base-feature.

That said we've chosen for "default" as it is what cargo uses to define the "normally activated" features. So I'm not 100% convinced this would be worth the change.

[zen-xu]

However change would make more sense to me for the default feature.

🤦🏻‍♂️ Sorry for my incorrect description. It should be the feature，not the env.

[zen-xu]

Furthermore, the naming meaning of base is superior to default; it's like the foundation of a feature, with each feature adding extra dependencies on top of it.

[tdejager]

I suggest we keep this open for a while to see how others feel about it :) As it would be a breaking change.

[olivier-lacroix]

I feel like default is a pretty good name even for the feature:

• it aligns with the name of the default environment
• It is the feature tables / values will be associated with when the feature is not specified. In that sense, it is indeed the default feature

[zen-xu]

I feel like default is a pretty good name even for the feature:

• it aligns with the name of the default environment

• It is the feature tables / values will be associated with when the feature is not specified. In that sense, it is indeed the default feature

You can think of default feature as the base image of Docker; we are extending its behavior rather than overriding it.

Or in the OOP inheritance, we refer to it as a base class rather than a default class.

That's why like channels is under the [project] rather than under the [default]， it is because the actual default configs are under the [project].