feat: redesign match play and add broadcast tooling

scripts/fixtures/dev-forum-post.bbcode

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+[centre][imagemap]
+https://assets.ppy.sh/beatmaps/2566536/covers/cover@2x.jpg
+0 0 50 100 https://discord.gg/n3mZgWk Join the Discord
+50 0 50 100 https://esports.vash.software Vash Esports
+[/imagemap]
+[size=150][b]Dev Weekly[/b][/size]
+[color=#ff66aa]An international 1v1 double-elimination osu! tournament[/color], run by Vash Esports.[/centre]
+
+[notice]Registration closes in a week. Every match is refereed by the Vash bot, so matches start on time and nobody waits for a referee.[/notice]
+
+[heading]Tournament schedule[/heading]
+[list]
+[*][b]Registration[/b] · this week
+[*][b]Qualifiers[/b] · the weekend after
+[*][b]Round of 16 → Grand Finals[/b] · one round per weekend
+[/list]
+
+[heading]Prizes[/heading]
+[list=1]
+[*]Gold crown: profile banner, $130 (or 5 years of osu!supporter)
+[*]Silver crown: profile banner, $60
+[*]Bronze crown: profile banner, $30
+[/list]
+
+[box=Ruleset]
+[b]Winning conditions[/b]
+[list]
+[*]Round of 16 is BO7, first to 4 points.
+[*]Quarterfinals and Semifinals are BO9. Finals and Grand Finals are BO13.
+[/list]
+[b]Match proceedings[/b]
+[list]
+[*]At the start, both players [c]!roll[/c]. The higher roll picks first or bans first.
+[*]One ban per player up to the Round of 16, two from the Quarterfinals on.
+[*]Tiebreaker: each player bans one of three; the remaining one is played.
+[*]Mods allowed in the tiebreaker (Freemod): Hidden, HardRock, Easy (2x multiplier).
+[/list]
+[/box]
+
+[box=Scheduling]
+All times are UTC. The site schedules matches around both players' preferred hours. Both players must agree to a reschedule on the match page.
+[/box]
+
+[quote="Stan"]gl hf, and have fun![/quote]