feat: add async tour system

Players can create tours with selected courses/layouts and a date range.
Others join via a 6-character tour code, play the courses, and report
their total strokes. Live leaderboard with points and +/- par display.

Includes: database schema, model, service, routes, views, and styling.

server.js

@@ -4,6 +4,7 @@ const path = require('path');
 const { initializeDatabase, checkAndPopulateDatabase } = require('./src/db');
 const playerRoutes = require('./src/routes/players');
 const courseRoutes = require('./src/routes/courses');
+const tourRoutes = require('./src/routes/tours');
 const pageRoutes = require('./src/routes/pages');
 const logger = require('./src/logger');
 
@@ -17,6 +18,7 @@ app.use(express.json());
 
 app.use(playerRoutes);
 app.use(courseRoutes);
+app.use(tourRoutes);
 app.use(pageRoutes);
 
 initializeDatabase().then(async () => {