Fixed a bug where dist migrate would delete dist-workspace.toml

A bug was introduced in 0.27.0 where, instead of dist migrate never deleting dist-workspace.toml, it would always delete it. This has been fixed.

• impl @duckinator fix: avoid 'dist migrate' deleting dist-workspace.toml

Warn if a tool is "shadowed" on your PATH

Shell installers now check if the tool it installed is shadowed by another tool on your path.

• impl @mistydemeo feat: check for shadowed binaries in shell installer

Prefer GitHub over Axo Releases

This release switches the preferred installation location to GitHub. In prior releases, if the user had both GitHub Releases and Axo Releases selected, generated installation scripts and receipts would prefer to fetch from GitHub.

• impl @mistydemeo feat: prioritize github over axo