Stop Auto downloading new updates, bunch of things on startup

[shinebayar-g]

Check for existing issues

• Completed

Describe the bug / provide steps to reproduce it

It looks like recently you implemented "auto-download" feature. While it's convenient it's not really user friendly, consuming unnecessary data. I see language server updates, zed updates are auto downloaded. Please make it configurable, so users can decide what action they want to take on based on their preference.

Environment

Zed: v0.126.1 (Zed Preview)
OS: macOS 14.3.1
Memory: 16 GiB
Architecture: aarch64

If applicable, add mockups / screenshots to help explain present your vision of the feature

No response

If applicable, attach your ~/Library/Logs/Zed/Zed.log file to this issue.

No response

[Moshyfawn]

You can set "auto_update": false to prevent zed from automatically updating itself.

[Moshyfawn]

For Zed reusing the already installed language servers, see #4978 +👍.

[shinebayar-g]

Check for updates != Download updates right? I assume checking for updates means, check if there is an update, but not download it right away. They are supposed to be 2 separate actions.