Allow adding annotations to items at comptime

[asterite]

Problem

In some of our macros certain functions/structs need annotations added to them: #[note] adds a bunch of stuff and then marks the struct as #[abi(notes)] for exporting.

Happy Case

There's an API to add annotations to items, likely something like this:

• FunctionDefinition::add_annotation(self, Quoted)
• StructDefinition::add_annotation(self, Quoted)
• Module::add_annotationh(self, Quoted)

The above functions error if the Quoted value can't be parsed into an attribute.

Also, if these annotations refer to functions, those functions should eventually run in turn (this could be split into a separate issue, though)

Workaround

None

Workaround Description

No response

Additional Context

No response

Project Impact

None

Blocker Context

No response

Would you like to submit a PR for this Issue?

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Support Needs

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[asterite]

Duplicate of #5874