railway upgrade command

[JakeCooper]

We should be able to detect if installed via homebrew, npm, yarn or other, and provide an upgrade command for railway

[nebulatgs]

Ideally we should be able to upgrade even if installed via the install script, similar to how deno upgrade works.

[KishanBagaria]

Here's how yarn does it:
https://github.com/yarnpkg/yarn/blob/6db39cf0ff684ce4e7de29669046afb8103fce3d/src/cli/commands/install.js#L90-L124
https://github.com/yarnpkg/yarn/blob/6db39cf0ff684ce4e7de29669046afb8103fce3d/src/util/yarn-version.js

[alexng353]

Here's how yarn does it: yarnpkg/yarn@6db39cf/src/cli/commands/install.js#L90-L124 yarnpkg/yarn@6db39cf/src/util/yarn-version.js

I read the code a little bit and they actually store the installation method in yarn's package.json file. If cli does that at installation time this is definitely possible without doing copious amounts of starship-esque command spamming