Merge from origin/emacs-28

Merge from origin/emacs-28

ad0798a395 * etc/TODO: Add interactive mode tagging.
879ef5b19a * etc/TODO: Rearrange to start with "Simple tasks".
d73f0e96a7 ; * etc/TODO: Move elpa.gnu.org items to the end.
7cf1229706 ; * etc/TODO: Mention a relevant bug report.
f733b909ff * etc/TODO: Remove outdated item.  (Bug#50904)
94c247d659 ; Oops, fix up last commit
88378acbfc Rename arguments of ERC's '/whois' and simplify doc string
205eb7f801 ; s/class/type
86da812afb Migrate Xref off EIEIO
5c73dfcbcb * admin/release-branch.txt: New file.
f060d1c9a4 * lisp/dired.el (dired-omit-mode): Declare, to avoid compi...

# Conflicts:
#	etc/NEWS