Add rust-enhanced repository under automation

[Kobzol]

Repo: https://github.com/rust-lang/rust-enhanced

CC @ehuss

Extracted from GH:

org = "rust-lang"
name = "rust-enhanced"
description = "The official Sublime Text 3 package for the Rust Programming Language"
bots = []

[access.teams]
security = "pull"
highfive = "write"

[access.individuals]
ehuss = "write"
jasonwilliams = "admin"
Mark-Simulacrum = "admin"
jdno = "admin"
rylev = "admin"
badboy = "admin"
jhasse = "write"
steveklabnik = "write"
pietroalbini = "admin"
rust-highfive = "write"
rust-lang-owner = "admin"

[ehuss]

In practice it is only me maintaining this. I don't know if it is worth creating a subteam for this, though?

cc @rust-lang/devtools

[Manishearth]

@ehuss We used to have an "IDEs and editors" team and I think we should rebrand that as "editor support" or something and add all of the editor packages there. But I'm fine with this being an odd case for now