Updating Helm settings and adding new bindings

Added helm-mode to `use-package` idle timer to load when idle instead of just defer.

"SPC s" Bindings ("s" prefix signifies showing buffer data)
- sy = yank / kill ring
- sm = mark ring
- sr = registers

"SPC f" Bindings ("f" prefix signifies file activies)
- fh = helm-find-files

"SPC F1" is `helm-apropos`
`s` is already taken, what about `r` ? It is less crowded and there already is `reg` for `evil-show-register`. `reg` is another funny binding we must change.
My proposal:
`ry` for `helm-show-kill-ring`  (or even `rp` since in Vim, paste is `p`)
`rr` for `helm-register`
`re` for `evil-show-register`
`rm` for `helm-all-mark-rings`