feat: Generate admin command documentation

The first part of getting admin command docs on the website.

There's also the beginnings of manpage generation here, although it's
kinda sus and I'm not sure how it's supposed to work. I'll leave that to
anyone who wants to package it.

We introduce the beginings of the xtask pattern here - we do a lot of
file generation, I thought it would be best to avoid doing that on every
compilation. It also helps avoid lots of runtime deps.

We'll need to document generating this stuff & probably add pre-commit
hooks for it, though.

src/admin/query/account_data.rs

@@ -8,7 +8,7 @@ use crate::{admin_command, admin_command_dispatch};
 #[admin_command_dispatch]
 #[derive(Debug, Subcommand)]
 /// All the getters and iterators from src/database/key_value/account_data.rs
-pub(crate) enum AccountDataCommand {
+pub enum AccountDataCommand {
 	/// - Returns all changes to the account data that happened after `since`.
 	ChangesSince {
 		/// Full user ID

src/admin/query/appservice.rs

@@ -6,7 +6,7 @@ use crate::Context;
 
 #[derive(Debug, Subcommand)]
 /// All the getters and iterators from src/database/key_value/appservice.rs
-pub(crate) enum AppserviceCommand {
+pub enum AppserviceCommand {
 	/// - Gets the appservice registration info/details from the ID as a string
 	GetRegistration {
 		/// Appservice registration ID

src/admin/query/globals.rs

@@ -6,7 +6,7 @@ use crate::Context;
 
 #[derive(Debug, Subcommand)]
 /// All the getters and iterators from src/database/key_value/globals.rs
-pub(crate) enum GlobalsCommand {
+pub enum GlobalsCommand {
 	DatabaseVersion,
 
 	CurrentCount,

src/admin/query/mod.rs

@@ -27,7 +27,7 @@ use crate::admin_command_dispatch;
 #[admin_command_dispatch]
 #[derive(Debug, Subcommand)]
 /// Query tables from database
-pub(super) enum QueryCommand {
+pub enum QueryCommand {
 	/// - account_data.rs iterators and getters
 	#[command(subcommand)]
 	AccountData(AccountDataCommand),

src/admin/query/presence.rs

@@ -7,7 +7,7 @@ use crate::Context;
 
 #[derive(Debug, Subcommand)]
 /// All the getters and iterators from src/database/key_value/presence.rs
-pub(crate) enum PresenceCommand {
+pub enum PresenceCommand {
 	/// - Returns the latest presence event for the given user.
 	GetPresence {
 		/// Full user ID

src/admin/query/pusher.rs

@@ -5,7 +5,7 @@ use ruma::OwnedUserId;
 use crate::Context;
 
 #[derive(Debug, Subcommand)]
-pub(crate) enum PusherCommand {
+pub enum PusherCommand {
 	/// - Returns all the pushers for the user.
 	GetPushers {
 		/// Full user ID

src/admin/query/raw.rs

@@ -19,7 +19,7 @@ use crate::{admin_command, admin_command_dispatch};
 #[derive(Debug, Subcommand)]
 #[allow(clippy::enum_variant_names)]
 /// Query tables from database
-pub(crate) enum RawCommand {
+pub enum RawCommand {
 	/// - List database maps
 	RawMaps,
 

src/admin/query/resolver.rs

@@ -8,7 +8,7 @@ use crate::{admin_command, admin_command_dispatch};
 #[admin_command_dispatch]
 #[derive(Debug, Subcommand)]
 /// Resolver service and caches
-pub(crate) enum ResolverCommand {
+pub enum ResolverCommand {
 	/// Query the destinations cache
 	DestinationsCache {
 		server_name: Option<OwnedServerName>,

src/admin/query/room_alias.rs

@@ -7,7 +7,7 @@ use crate::Context;
 
 #[derive(Debug, Subcommand)]
 /// All the getters and iterators from src/database/key_value/rooms/alias.rs
-pub(crate) enum RoomAliasCommand {
+pub enum RoomAliasCommand {
 	ResolveLocalAlias {
 		/// Full room alias
 		alias: OwnedRoomAliasId,

src/admin/query/room_state_cache.rs

@@ -6,7 +6,7 @@ use ruma::{OwnedRoomId, OwnedServerName, OwnedUserId};
 use crate::Context;
 
 #[derive(Debug, Subcommand)]
-pub(crate) enum RoomStateCacheCommand {
+pub enum RoomStateCacheCommand {
 	ServerInRoom {
 		server: OwnedServerName,
 		room_id: OwnedRoomId,

src/admin/query/room_timeline.rs

@@ -8,7 +8,7 @@ use crate::{admin_command, admin_command_dispatch};
 #[admin_command_dispatch]
 #[derive(Debug, Subcommand)]
 /// Query tables from database
-pub(crate) enum RoomTimelineCommand {
+pub enum RoomTimelineCommand {
 	Pdus {
 		room_id: OwnedRoomOrAliasId,
 

src/admin/query/sending.rs

@@ -8,7 +8,7 @@ use crate::Context;
 
 #[derive(Debug, Subcommand)]
 /// All the getters and iterators from src/database/key_value/sending.rs
-pub(crate) enum SendingCommand {
+pub enum SendingCommand {
 	/// - Queries database for all `servercurrentevent_data`
 	ActiveRequests,
 

src/admin/query/short.rs

@@ -7,7 +7,7 @@ use crate::{admin_command, admin_command_dispatch};
 #[admin_command_dispatch]
 #[derive(Debug, Subcommand)]
 /// Query tables from database
-pub(crate) enum ShortCommand {
+pub enum ShortCommand {
 	ShortEventId {
 		event_id: OwnedEventId,
 	},

src/admin/query/users.rs

@@ -8,7 +8,7 @@ use crate::{admin_command, admin_command_dispatch};
 #[admin_command_dispatch]
 #[derive(Debug, Subcommand)]
 /// All the getters and iterators from src/database/key_value/users.rs
-pub(crate) enum UsersCommand {
+pub enum UsersCommand {
 	CountUsers,
 
 	IterUsers,