Add keyword-generics-initiative repo under automation

[Kobzol]

Repo: https://github.com/rust-lang/keyword-generics-initiative

Extracted from GH:

org = "rust-lang"
name = "keyword-generics-initiative"
description = "Public repository for the Rust keyword generics initiative"
bots = []

[access.teams]
security = "pull"

[access.individuals]
rylev = "admin"
badboy = "admin"
jdno = "admin"
pietroalbini = "admin"
rust-lang-owner = "admin"
oli-obk = "write"
nikomatsakis = "write"
yoshuawuyts = "write"
Mark-Simulacrum = "admin"

[Kobzol]

Apparently, these is currently no GitHub team for keyword-generics. Let me know if I should create one.

[rylev]

@Kobzol the GitHub team name is initiative-keyword-generics.

[Kobzol]

Oh, I didn't notice that, thanks.