eo-docs: Remove Doxygen tags from efl*.eo files

eo-docs: Remove Doxygen tags from efl*.eo files

Summary:
- Replace '\@ref name' with '@name'
- Remove unused \@internal tag
    This tag affects text AFTER it, and there is no text after it.
- Remove \@note tag
    Replaced with a simple NOTE: text, since eolian does not have an equivalent tag.
- Remove spurious \@Efl... tags
    They should really be @Efl...
- Remove \@p tags
    There is no eolian equivalent, and a simpler $ suffices in this case.

Fixes T7482

Reviewers: q66

Reviewed By: q66

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Maniphest Tasks: T7482

Differential Revision: https://phab.enlightenment.org/D7372