Support local-first version expressions

[marktsuchida]

Versions suffixed with ~ should alter the matching rules, such that the closest matching version among the already installed JDKs is selected.

17~ should find the newest installed 17.x, failing if no 17.x is installed
17+~ should find the newest installed, failing if the newest installed is less than 17

This can minimize downloads when used for tasks where having the latest JDK is not critical.

[marktsuchida]

Could optionally also pick up locally installed JDKs (e.g., system-installed, outside of cjdk), where known (or somehow configured), at least when the vendor is left unspecified.

[marktsuchida]

Without --no-remote (#5), perhaps it should download, rather than fail, when not found locally.

[ctrueden]

Could optionally also pick up locally installed JDKs

I just added some logic like this to my dotfiles (1). In a nutshell, you can parse the output of update-java-alternatives -l for (some flavors of) Linux, or /usr/libexec/java_home -V for macOS. I need to add cjdk support to my dotfiles... 😅