wip

[pavelzw]

Description

Fixes #{issue}

How Has This Been Tested?

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i would like to add exclude-newer to the pixi global configuration as well. something like this config:

  exclude-newer = "7d"
  default-channels = [
      { channel = "https://my.internal/channel", exclude-newer = "0d" },
      "conda-forge",
  ]


  this setting should lead to `pixi init` changing, `pixi exec` respecting exclude-newer, `pixi build` respecting that exclude-newer and `pixi global
  install` respecting it (also add exclude-newer in these cases to the pixi global manifest).

  no need for package overrides, though

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added sufficient tests to cover my changes.
• I have verified that changes that would impact the JSON schema have been made in schema/model.py.