Synchronize with Discord

[nderjung]

The Unikraft OSS community makes heavy use of Discord for communication and coordination. This issue tracks additional logic to synchronize the state of this governance repository with our Discord server.

The governance repository acts as a source of truth for the list of maintainers, reviewers and Special Interest Group (SIG) members and therefore the permissions members of the community have in manipulating resources on in our ecosystem, which at this time is namely GitHub. Since all members of every SIG work and coordinate using Discord, we should make additional modifications to the governctl program to synchronize both members and permissions to reflect the state of the community. The aim here is to automate repetitive tasks that maintainers are experiencing.

Itemized tasks

• Introduce DiscordClient API utility #20
• Synchronize the creation of SIG Discord channels by parsing each team file #13
• Synchronize the creation of SIG Discord roles by parsing each team file #14
• Synchronize adding or removing of members to the global Discord maintainer role #15
• Synchronize adding or removing of members to the global Discord reviewer role #16
• Synchronize adding or removing of members to the global Discord contributor role #17
• Send PR reminder notification messages to assigned reviewers via Discord #18
• Populate each SIG maintainer, reviewer and member with their Discord handle #19

Implementation

1. Create an additional helper file, apis/discord/discord.go which exposes the constructor NewDiscordClient. Methods attached to the returned DiscordClient struct shall accept bespoke attributes necessary for manipulating the aforementioned work items;
2. Rename the Sync method for the Teams struct to SyncGitHub and introduce a new method SyncDiscord which iterates over each team ("SIG"), and makes relevant API calls to add, remove, edit, etc. users identified by their Discord username. See above work items.
3. Populate each "user" attribute (maintainers, reviewers and members) in the teams/ directory with their Discord handle, e.g.:

     - name: Alexander Jung
       github: nderjung
   +   discord: nderjung#4353

4. introduce separate CLI commands for each task, e.g. governctl sync-discord-channels