[we4sz]

File doesn't carry five fields that Slack's file object and files.info documentation show. I found them comparing a real files.info response with File: four of them are in it. My app doesn't read any of them through a workaround today. This models them. It is one commit.

1. UserTeam (user_team): "Team of the user who created the file.", the file's counterpart of UserTeam on message events from Adding PreviousMessage to MessageDeleted, UserTeam and SourceTeam to message events, and MetadataJson to MessageUpdate #264.
2. SourceTeam (source_team): "Team where the file originated."
3. HasMoreShares (has_more_shares): "Whether there are additional shares not returned.", next to SkippedShares.
4. MediaDisplayType (media_display_type): "How the media should be displayed."
5. DisplayAsBot (display_as_bot), the same property MessageEventBase has. The reference shows it in the files.info example without describing it, so it has no doc comment.

Compatibility

Additive only. The new properties default to null or false.

Testing

New FileTests: a file with user_team and source_team, one with the other three fields, and one with none of them. ./do test passes (786 tests).

Seen in a real response: user_team, has_more_shares, media_display_type and display_as_bot.

Not verified: source_team. I haven't seen it in a real response, so it follows the reference only. The same real response has is_modified_by_ai, which I left out: it isn't in the reference (which has ai_generated, and SlackNet has IsAiSuggested), so there is no Slack wording to copy. I also haven't run my app against a local pack of this branch.