fix 'Unknown key' for PHP8.2

Update README.md

Fix markdown...

add release procedure to README.md

Bump release date

Shows empty todo items in todo list as <no title>

Allows empty todo items

Refactores rendering code to properly use the render data

- Removes $todotitle as it is not used
- Skips rendering if $data is empty

Bump Date

Initialise $result for all paths

Fixes undefined variable $return in todo.php on line 284

Fixes undefined variable $condition2 in list.php on line 419

bump plugin.info.txt

return empty array if there are no todo pages

Calling function expects an array.
Returning an empty array instead of null saves a null check and also makes sense when reasoning about the function.

Update todo.php

Update todo.php

Ensure `$option` is not empty before unpacking

bump version date

Fix for empty $todopages when array is expected.

Fixes #139. related to #121.
Fixes same problem in other functions too.

Bump version date, plugin.info.txt

fix shortlist because of unnecessary return

#128

Bump Release Date

Don't try to render empty Todotable. Fixes #121

added display of user and date of task completion.

show all assigned users instead of first one only

removed ancient change log from code

corrected regex greedyness, fixed #84