List deleted docs alphabetically

perlrepository was added at the end in 5edbc4ff, when I apparently failed
to notice the list was in alphabetical order.

For RT #119615.
Add missing word

For RT #119615.
Add titles to deleted OO docs

Helpful somebody who encounters these documents or their titles realize
they contain links to where current information can be found.

For RT #119615, based on Father Chrysostomos's comment in RT #119571.
Make perltodo.pod match other deleted documents

Have the title make clear it's now only a link to the to-do list.

Re-arrange the body content so the most useful thing — the link to the
current to-do list — is first and the history afterwards.

For RT #119615.