npm
feat(install): add instructions for git packages
This PR adds instructions to documentation regarding the installation of packages from git repositories.
References
Ref: https://github.com/nodejs/api-docs-tooling/issues/236#issuecomment-2752987110
If we're gonna advertise this more heavily we'll want to link to or reiterate some of the many quirks of installing from source control. A good example recently is this issue where some folks didn't know that because git source control and not published assets there are scripts that always run.
We don't really recommend using git urls, such as it is. It's only sometimes helpful in local development and never a good idea for a published module. Git urls are not idempotent, and the assumption of many of them is that they are source code that needs to be built.
