Ensure syntax proxy removes undefined instructions

[NuroDev]

This change ensures that the getSyntaxProxy removes any instruction properties that are undefined.

Additionally this fixes a broken test that was reporting a false positive & adds another test to ensure issues like this do not happen again.

Before

get.accounts({ after: undefined });
// { __RONIN_QUERY: { get: { accounts: { after: undefined } } } }

After

get.accounts({ after: undefined });
// { __RONIN_QUERY: { get: { accounts: {} } } }

Originally, the change was landed in ronin-co/syntax#59.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

[github-actions]

Released an experimental package:

bun add ronin@ben-ron-1099-experimental-102

This package will be removed after the pull request has been merged.