@compact deprecated use for comparison. #190 (#191)

* Deprecate @compact use for comparison. Old behaviour is enabled using --use-old-compact-eq.

* Update documentation for @compact attribute

Clarified the behavior of the @compact attribute regarding padding and its deprecation.

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Co-authored-by: Christoffer Lerno <[email protected]>

Author: neokeld

src/content/docs/Language Common/attributes.md

@@ -65,9 +65,7 @@ and is a no-op on 64-bit Windows.
 
 *Used for: struct, union*
 
-When placed on a struct or union, it allows the value to be compared
-using `==` and `!=`. The restriction is that it may not have any
-padding, as if it had the `@nopadding` attribute.
+This attribute works like @nopadding, but is applied recursively for any sub-elements, ensuring that there is no padding anywhere in the struct.
 
 ### `@const`