[Feature] Allow `inline` functions to be called from anywhere.

[mohammadfawaz]

🚀 Feature

We should be able to call inline from anywhere and let the compiler decide if the call is legal or not depending on the context and what's inside the inline.

[mohammadfawaz]

@IGI-111 what is the plan for this with the new unified fn syntax? The idea would be to allow helper functions to contain anything (including onchain-only code).