task: Add new repository for idea collection

Following this blogpost:
https://eshapard.github.io/code/a-separate-taskwarrior-configuration-for-ideas.html

I think it is a really good idea to try this out.
At first I was collecting ideas in my regular taskwarrior repository --
this was no good as every task list was flooded by somedays and maybes
which would never leave. But I still wanted to have a nice repository to
collect all my ideas in.

So, the second strategy was to have one big (markdown) file which would
simply collect all my ideas. But now I was doubling and tripling them up
because the list was so long, and it was more of a chore to find where
to put everything than just a quick 'idea add'.

This may be the best of both worlds: making use of the nice interface to
a task database using the full strength of taskwarrior querying, without
cluttering up my main task repository.

The workflow is exactly as with regular taskwarrior, only the executable
is not called `task` (or `t` in my case) but `idea`. So you e.g. add an
idea with `idea add`, or query all diy ideas with `idea +diy`.
Just like regular taskwarrior.

office/.config/sh/alias.d/taskwarrior.sh

@@ -39,3 +39,9 @@ alias tad="task +ACTIVE done"
 alias tas="task +ACTIVE stop"
 
 alias to="task note"
+
+#---
+
+idea() {
+    task rc.data.location="$TASK_DATA_IDEA" "$@"
+}