[#3583118] feat: update version handling for main branch in composer and git setup scripts

Vinay Gawaderequested to merge
issue/drupalpod-3583118:main into main

Problem

DrupalPod does not currently support using:

DP_CORE_VERSION=main

for Drupal core projects.

  • Composer converts main → ~main (invalid constraint)
  • Git treats main as a tag (tags/main) instead of a branch

Solution

This MR adds minimal support for main:

  • Use main-dev@dev for Composer installs
  • Treat main as a development branch (origin/main) in Git

Changes

  • composer_setup.sh

    • Handle main → main-dev@dev

  • git_setup.sh

    • Treat main same as *.x (dev branches)

Result

  • Composer installs Drupal using latest dev (main)
  • Git checks out correct branch (origin/main)
  • DrupalPod works with Drupal core main (e.g., 12.x-dev)

Notes

  • No impact on existing version handling (*.x, stable tags)
  • Change is minimal and backward-compatible

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