)

in [Release v0.36.0 - jj-vcs/jj](https://github.com/jj-vcs/jj/releases/tag/v0.36.0),
jj has breaking changes which breaks jjui. 

This commit includes the fixes for:
- deprecation of `--destination` flag: changed to `--onto`
- deprecation of `--edit` flag: changed to `--editor`
- deprecation of `--allow-new` flag for `git push`: removed all commands
  calling `git push` with `--allow-new`

Additionally, to replace `d` for `--destination`, `o` is used for the
new `--onto` flag in related modes, which conflicts with OpLog.Mode.
Hence, a `IsNormalMode` check is added to ui.

Now users can use `space` to add or remove revisions to the abandon list

Currently, tracking for all remotes as the bookmark list doesn't allow choosing which remote to track for. This should be fixed when bookmark list is remodelled.

This is to help folks who are planning to use AI to get stuff done.

The idea is that we should only route the input messages to the
currently focused model but broadcast the rest so that we can get rid of
special conditioning and improve the interaction across the app. The
first use case is broadcasting the selection change messages instead of
pulling them from the main context.

this is to allow commands like below, which opens a file for quick edits
from jjui:
```toml
[custom_commands.open_file]
key = ["O"]
lua = '''
local file = context.file()
if not file then
    flash("No file selected")
    return
end
exec_shell("vim " .. file)
'''
```

ps: i tried using `os.execute` but it wouldn't return to jjui after vim
exits. hence exec_shell function is exposed via lua.

* helppage: add op log revert

* readme: fix redo and update custom command examples

Commit 8481b92 broke ctrl-u/d scrolling in the preview pane, see below
code:
```
if common.IsInputMessage(msg) {
    if m.oplog != nil {
        cmds = append(cmds, m.oplog.Update(msg))
    } else {
        cmds = append(cmds, m.revisions.Update(msg))
    }
    return tea.Batch(cmds...)
}
```
This causes unhandled key messages to be routed only to oplog or
revisions, and then returns early, so they never reach the preview
model's Update() call which happens later in the function.


This fix groups preview related commands and make sure they are always
handled.

Also, added a YOffset() method to internal/ui/preview/preview.go to
expose the viewport's Y offset for testing purposes.