Expose metadata inside the lint rule

[ematipico]

This is a very easy task.

You should add this:

    pub fn metadata(&self) -> &RuleMetadata {
        &R::METADATA
    }

In here:

biome/crates/biome_analyze/src/context.rs

Line 25 in 4213527

impl<'a, R> RuleContext<'a, R>

Please make sure to add proper documentation for the new function

[dyc3]

I can pick this up.