Customizable separator for the cli tag arg

[tateexon]

Affected Packages

cli

Problem

I would like to use changesets to more cleanly handle golang releases via tags in a mono repo. The only thing I have found stopping me from doing this is that the tags here are not configurable: https://github.com/changesets/changesets/blob/main/packages/cli/src/commands/tag/index.ts#L12-L14
If I could change the ${pkg.packageJson.name}@${pkg.packageJson.version} to be ${pkg.packageJson.name}/v${pkg.packageJson.version} then this would work for me and I could use more of the changeset features that are awesome.

Proposed solution

From the cli allow me to pass some customization filter for monorepos so when I run npx changeset tag < some filter syntax > it would allow a user to change the pattern from @ to /v if wanted.