add role badges

[connyduck]

This adds support for the new Mastodon 4.2 role badges. Admins can define if a role should be visible in the interface and then we get it delivered by the Api on the Account object like this:

"roles": [
        {
              "id": "4",
              "name": "TEST",
              "color": "#ffee00"
        }
  ]

• keeps compatibility with older Mastodon version and non Mastodon servers
• Took me a while, but I figured out a way to use the color and have it look ok on all backgrounds (Mastodon itself ignores the color and just always uses its brand color)
• falls back to Tusky blue in case no color is configured
• I adjusted the "Follows you" and "Bot" badges so they match the new badge style
• In case the "Follows you" and "Bot" badges are visible at the same time, "Follows you" gets its own line and "Bot" goes into the same line as the role badge.
• Will work even with a lot of role badges (right now users can only have 1 role at once though)
• Will work even when the badges federate (right now they don't)

[digitalf0x]

Mastodon itself renamed the Bot flag to Automated. As you're modifying that label here, should Tusky follow?

This may include modifying the profile setting inside Tusky (Mastodon changed the label from This is a bot account to This is an automated account).

(I have no strong preference either way.)