Added community server link in sidebar

[JakeShirley]

Checklist

• [x] I have described what this PR contains

Choose one of the following two options:

• • [ ] This PR does not introduce major changes
• • [x] This PR introduces major changes, and I have consulted @buresdv, @jboi or @mormaer in the Mlem Development Matrix room

Choose one of the following two options:

• • [ ] This PR does not change the UI in any way
• • [x] This PR adds new UI elements / changes the UI, and I have attached pictures or videos of the new / changed UI elements

Pull Request Information

About this Pull Request

Small sidebar polish to link to the server that the community is from

Screenshots and Videos

Additional Context

n/a

[buresdv]

Could you remove the "Server" section header, and move the link under Moderators?

[mormaer]

@JakeShirley - given the redesigned sidebar is this PR now safe to close?

[JakeShirley]

Outdated, closing.