docs: adding for some of #70 doc

[AnirudhG07]

Along with this, some minor additions to custom-shell.yazi description

[AnirudhG07]

I have added 4 point docs here referred in #70 @sxyazi where to put ya pack?

[AnirudhG07]

Ill be adding ya pack in DDS page. you can shift it as you wish.

[lpnh]

Ill be adding ya pack in DDS page. you can shift it as you wish.

How about adding it as a subpage under the Plugins section? Something like:

---
sidebar_position: 5
description: Yazi Package Manager
---

# Package Manager

## `ya pack`

...

[AnirudhG07]

I would leave that up to sxyazi, I was also hoping for another page, thats why i asked about it previously. If the maintainer wants, that is very much possible

[AnirudhG07]

Changed the ya.preview_code in docs wrt #1550, accordingly. Hope its fine

[sxyazi]

Thanks! I will review it in the next two days

[AnirudhG07]

Added wrap docs as per #1159.

[AnirudhG07]

Should i also add refresh docs too? I noticed it being mentioned in discord.