Remove evil-org for worf

[TheBB]

This is a repurposing of #1417, the oldest still-open pull request to Spacemacs. It removes evil-org and uses worf for much of its functionality. As a whole, worf has way higher quality and more functionality that we can bind in the future.

• g{h,j,k,l} still exist and work mostly the same way (a little bit more strict about levels)
• g] and g[ added, they are pure next/previous operations that don't care about levels
• Change bindings for inserting headings to be more consistent, both with itself and evil.
  • Previous:
    • o: insert item below
    • O: insert heading below
    • M-o: insert sub-heading below
    • M-t: insert todo sub-heading below
    • T: insert todo heading below
  • New:
    • o: insert item below
    • O: insert item above
    • M-o: insert heading below
    • M-O: insert heading above
    • M-t: insert todo heading below
    • M-T: insert todo heading above
• Overriding <, > and - is gone. M-h and M-l cover the first two and ,- the latter.
• Overriding t for org-todo is also gone, moved this to ,TT.
• Add an org navigation transient state on ,n.

[TheBB]

Maybe put this on hold pending discussion in #9011

[Stebalien]

FWIW, I've applied this PR locally and find I much prefer worf over evil-org. evil-org to deviates from Evil/Vim in surprising and frustrating ways.

[Stebalien]

Actually, things aren't quite as rosy as I thought. Most importantly, [ and ] are rebound to worf-backward and worf-forward so they can't be typed (WTF?).

Also, o (insert-item-below) can be very aggressive. For example, pressing o in either of the following states:

* Item
  - A
█

* Item
  - A

█

Opens a new item instead of opening a new line:

* Item
  - A
  - |

(in the second case, the cursor goes up).

[Stebalien]

On further inspection, I'm pretty sure worf is not intended to be used alongside evil. It adds vim-like features to org-mode but doesn't restrict these features to normal-mode (it doesn't integrate with evil at all).

[TheBB]

Closing this for #9041

[syl20bnr]

On further inspection, I'm pretty sure worf is not intended to be used alongside evil. It adds vim-like features to org-mode but doesn't restrict these features to normal-mode (it doesn't integrate with evil at all).

Indeed this was my principal issue with worf (like with lispy), the implicit states (state changes depending on the position in the buffer) are the opposite philosophy of Vi. I believed I commented on the original PR but I guess that we discussed it on Gitter a few years ago instead.

[syl20bnr]

@Stebalien thank you BTW ;-)