This PR reintroduces runtime warnings, being optionally togged on or off, as well as a new warning whenever a module reference is used.

pact>(module m g (defcap g () true) (defun some-guard () (create-module-guard "boop")))
Loaded module m, hash OE27e8Ms6lBjXMdlolQQ9NyKJNc_EKEbsa_RjZGkOtY
pact>(some-guard)
Warning: Using deprecated native create-module-guard: Module guards have been deprecated and will be removed in a future release, please switch to capability guards
ModuleGuard {module: m,name: boop}
pact>(enforce-guard (some-guard))
Warning: Using deprecated native create-module-guard: Module guards have been deprecated and will be removed in a future release, please switch to capability guards
Warning: Module guard enforce detected. Module guards are known to be unsafe, and will be removed in a future version of pact
true
pact>

In the repl in particular: Warnings are printed after each expression execution and then cleared.

PR checklist:

• Test coverage for the proposed changes
• PR description contains example output from repl interaction or a snippet from unit test output
• (If Relevant) Documentation has been (manually) updated at https://docs.kadena.io/pact

Additionally, please justify why you should or should not do the following:

• Benchmark regressions
• Confirm replay/back compat (Ignore until core release)
• (For Kadena engineers) Run integration-tests against a Chainweb built with this version of Pact (Ignore until core release)