Update Diamond Dynasty docs for the franchise release

[kurtkluth]

Mirrors KluthStudios/diamond-dynasty#1. The game became a franchise and these pages described a game that no longer exists.

What the game gained

Seasons with standings and a four team playoff, five leagues to climb from Amateur to Legend with promotion and relegation, full player statistics (box scores, season and career lines), five facility upgrade tracks, a real ball and strike count on the mound, stolen bases, a fielding moment, a 100 floor Challenge Tower, and daily challenges.

The claim most worth getting right

Batting used to be judged purely on timing, and the docs said so in several places. Contact is now decided by where the barrel actually is when the ball arrives, so a perfectly timed swing at a pitch off the plate misses. Every page that described the old behaviour has been corrected, and Tips gained an entry on telling a timing mistake apart from an unreachable pitch, because the game now reports them differently.

Two other corrections worth flagging, since both were stated as fact and are now false:

• Docs said a Quick Match is the mode. Season matchdays are the main loop now, with Quick Match as an exhibition, and length is configurable at 3, 6, or 9 innings.
• Docs implied opponents are just "an AI club". They are now built around your league's strength and explicitly not scaled to your team rating, which is the single most important thing to communicate about progression: improving your roster genuinely makes your games easier.

Files

File	Change
docs/diamond-dynasty/gameplay.md	Rewritten. Adds leagues, statistics, facilities, Tower, dailies
docs/diamond-dynasty/how-to-play.md	Rewritten. Spatial contact, the live count, stealing, fielding
docs/diamond-dynasty/overview.md	Updated loop, plus sections on league-based opponents and stat tracking
docs/diamond-dynasty/tips.md	Eight tips to twelve; several old ones were wrong under the new engine
docs/diamond-dynasty/faq.md	New entries on difficulty scaling, end of season, and stat tracking
docs/diamond-dynasty/changelog.md	New dated entry
docs/guides/how-to-play.md	Refreshed the Diamond Dynasty section
src/data/projects.ts	New lede, summary, highlights, and update entry

Checks

npx tsc --noEmit clean. House style respected: no em or en dashes in any changed file.

Holding for the Test deployment check before merge.

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