release-plan prerelease

[mansona]

This will currently produce the following release:

@embroider/addon-dev 9.0.0-alpha.0 (major)
@embroider/addon-shim 3.0.0-alpha.0 (major)
@embroider/broccoli-side-watch 1.2.0-alpha.0 (minor)
@embroider/compat 5.0.0-alpha.0 (major)
@embroider/config-meta-loader 2.0.0-alpha.0 (major)
@embroider/core 5.0.0-alpha.0 (major)
@embroider/hbs-loader 4.0.0-alpha.1 (minor)
@embroider/macros 3.0.0-alpha.0 (major)
@embroider/reverse-exports 0.1.2-alpha.0 (patch)
@embroider/router 4.0.0-alpha.0 (major)
@embroider/shared-internals 4.0.0-alpha.0 (major)
@embroider/template-tag-codemod 0.6.0-alpha.0 (minor)
@embroider/util 1.15.0-alpha.0 (minor)
@embroider/vite 2.0.0-alpha.0 (major)

Some points:

• I would like to update release-plan to allow us to add alpha into the release names 👍 that's why this is currently a draft Done
• I thought some things in this list could just be released 🤷 maybe we shouldn't for consistency. Probably worth a discussion we can't do this because we're going to be passing --tag alpha to the pnpm release-plan release command in the release workflow. Keep them the same for now
• I made webpack private so it won't release
• I had to remove webpack as a peer of test-setup because it was breaking the plan process (understandably) test-setup is now private and I haven't changed its dependencies
• I made test-setup private since we don't know how to create it for a post-vite world (yet)