Add tag scoping support for setup scripts

Author: tybug Channel: #feedback Link: https://discord.com/channels/1405685085923049482/1405686161791516873/1531740103943258172

Description

Currently, there is no native way to scope setup scripts to specific tags. Users must implement workarounds like:

curl -fsS https://reflection.int.exe.xyz/tags | grep -q my-tag-name || exit 0

This feels like a hack and should be a first-class feature.

Request

Add native support for scoping setup scripts to tags, allowing users to conditionally run setup scripts based on the tags present in the current execution environment.

Motivation

This would provide a cleaner, more intuitive API for users who need to run different setup logic depending on which tags are active, eliminating the need for manual tag detection workarounds.