Allow postfix content script names for better sorting

[ExposedCat]

Feature Request

Currently, only unique-name.content can be used for naming content scripts. This results in inconvenient sorting in IDEs, such as:

- entrypoints
  - google.content
  - popup
  - safari.content

Allowing to use content.unique-name format, we would have

- entrypoints
  - content.google
  - content.safari
  - popup

which essentially groups content scripts in places such as IDE file viewers

Is your feature request related to a bug?

N/A

What are the alternatives?

N/A

Additional context

N/A