IRIS compatibility enforcement

## Link to the discussion thread

[Community](https://community.intersystems.com/post/ipmzpm-compatibility-enforcement).

## Describe the problem
Suppose I have a package called abc with three versions: 1.1, 1.2, and 1.3.

Version 1.1 can be installed on IRIS 2024.1, version 1.2 requires IRIS 2025.1, and version 1.3 can only be installed on the newest IRIS 2026.1.

## Describe the solution

I want to be able to specify this somehow in the ipm package or registry so that when someone runs zpm load, it automatically installs the latest version of the abc package that is compatible with the version of IRIS running on the server.

## Describe alternatives
Manually figuring out which version I need.

Start with the linked Community discussion and the zpm load entry point mentioned in the issue. Determine how package versions and the running IRIS version are represented and where compatibility could be evaluated. Done means a package can declare IRIS compatibility and zpm load selects the latest compatible version, with the behavior covered by tests.

Written by the indexing model from the issue text.