Add support for custom roles in website, beyond "Team leader"

[dtolnay]

I would like to render "Editor" below @JoelMarcey's entry in https://www.rust-lang.org/governance/teams/lang#spec, in the same location that others have "Team leader".

Source: https://blog.rust-lang.org/inside-rust/2023/11/15/spec-vision.html#specification-team

Output of cargo run -- dump-website for translations:

...
governance-team-wg-triage-name = Triage working group
governance-team-wg-triage-description = Triaging repositories under the rust-lang organisation

governance-team-wg-wasm-name = WebAssembly (WASM) working group
governance-team-wg-wasm-description = Improving on the end-to-end experience of embedding Rust code in JS libraries and apps via WebAssembly

governance-role-spec-editor = Editor

Output of cargo run -- static-api under v1/teams/spec.json:

{
  "name": "spec",
  "kind": "team",
  "subteam_of": "lang",
  "members": [
    {
      "name": "Mara Bos",
      "github": "m-ou-se",
      "github_id": 783247,
      "is_lead": true
    },
    {
      "name": "Felix Klock",
      "github": "pnkfelix",
      "github_id": 173127,
      "is_lead": true
    },
    {
      "name": "Eric Huss",
      "github": "ehuss",
      "github_id": 43198,
      "is_lead": false
    },
    {
      "name": "Joel Marcey",
      "github": "JoelMarcey",
      "github_id": 3757713,
      "is_lead": false,
      "roles": [
        "spec-editor"
      ]
    }
  ],

[dtolnay]

Another possible application: team affiliation in https://www.rust-lang.org/governance/teams/leadership-council#leadership-council. "Lang team rep"

[rylev]

Thanks for working on this! Overall it's a great change, and I'd be happy to merge except for one thing.

The current schema requires duplicating the member's name both in the team's members array as well as part of role's members array. Would it make sense to see if we can change the team members array schema to allow for specifying roles inline to the member declaration?

Perhaps something like:

members = [
  "rylev",
  { name =  "dtolnay", role = "foo" }
]

According to the toml spec this should be fine, but I think maybe some toml parsers struggle with this syntax?

[dtolnay]

Updated to set roles inline in the team's existing members array, as you suggested.

[rylev]

Awesome! I think we can merge as is as the static API looks good (and that's the only thing that is somewhat tricky to change after the fact). However, I'd like to get your opinion on my comments on the schema.

[rylev]

I think this is a great start! Let's merge this and we can adjust from here.

@dtolnay seems like there might be conflicts that need to be resolved first though.

[dtolnay]

Rebased to fix superficial conflict with #1164 in src/validate.rs.