Tiling Panes docs sections needs expanded

[ElykDeer]

There are a couple things missing from https://docs.binary.ninja/guide/index.html#tiling-panes:

• [ ] Sync groups
• [ ] Layout options (like, what they're able to do with split panes
• [ ] How to close a pane (keybinding/action, change the default ctrl-w perhaps)
• [ ] Some suggested workflows, like how to lay panes out to watch the stack while debugging
• [ ] Any other tips and tricks you can think of