feat: add persistent task board and activity tracking

[coldfire-x]

idea / problem

i want to manage my tasks in a single place, that is herdr, so i added a task board feature

requested change

#3253

review this, and hopefully merge it

why you want this

I hope herdr can manage my daily work in one place

[coldfire-x]

update: #3265

[airtonix]

what makes you think this is a good fit?

ie, why wouldn't you just already use one the of existing eleventy gajillion kanban tui clis in a separate herdr tab/pane/modal ?

[coldfire-x]

ok, it's an good idea