Add support for vim mode

[coder3101]

Add vim mode ported from #516

Description

Vim mode is one of the most requested feature for the editor, this PR is an attempt to port the vim mode originally introduced in 516.

Related Issues / Pull Requests

Closes #220

Motivation and Context

How Has This Been Tested?

MacOS Sonoma

Screenshots (if appropriate)

Checklist

• If the key of a setting is changed, the old attribute is updated or it is resolved in SettingsUpdater.
• If there are changes of the text displayed in the UI, they are wrapped in tr() or QCoreApplication::translate().
• If needed, I have opened a pull request or an issue to update the documentation.
• If these changes are notable, they are documented in CHANGELOG.md.

Additional text

Todos

• Update changelog with docs PR custom command link

[coder3101]

Documenation PR: cpeditor/cpeditor.github.io#324

[yashgosa]

Why is this pr dormant, vim mode is one of the most requested feature. ++ for review

[coder3101]

I am waiting for a new release cycle to begin before this PR can be merged. Currently alpha v6.12 (master) already has a new syntax highlighting editor and I don't want to push two biggest changes in a single release.

@ouuan I think we should start a new release cycle which will push syntax highlighting to beta. Or if new cycle doesn't make sense, a new beta release should be made.

People can try out beta easily because it doesn't involves building from source.

[ouuan]

I'd like v7.0 instead of v6.12 and expect lots of regressions. e.g. the "extra margin" setting doesn't work.

And then we can make other planned breaking changes as well.

[coder3101]

So what is your plan?

I thought we should create a v7.0 beta release from master (including KSH) while master contains other changes such as Vim emulation and other breaking changes. We will keep pushing changes to beta as patch releases from master (this gives us more people to test out stuff, not everyone is willing to build from source).

After testing, we can finally release 7.0.x to stable from beta.

[srqe]

@ouuan ^

[funcdfs]

It looks like the functionality of Vim has been fully developed, but the build process is quite complex. expect to get the latest Vim mode pkg With Vim mode included, this editor would be the most comprehensive and user-friendly one available with vim. Thank you for your development time input for this project.