feat(slides): add workshop slides for JSR-354 Money and Currency API

Introduce complete slide deck covering:
- problem statement and limitations of double, BigDecimal, and Currency
- fundamentals of MonetaryAmount, CurrencyUnit, and Money
- arithmetic operations, rounding, formatting, and parsing
- advanced concepts: currency conversion, MonetaryOperator, MonetaryQuery, MonetaryContext
- architecture and integration topics
- hands-on exercises for all sections

Add informational slide about JSR-354, its origins, and key contributors.
Include exercise guidance, pause slide, and workshop wrap-up.

Signed-off-by: Marcus Fihlon <marcus@fihlon.swiss>

slides/vercel.json

@@ -0,0 +1,7 @@
+{
+  "rewrites": [
+    { "source": "/(.*)", "destination": "/index.html" }
+  ],
+  "buildCommand": "npm run build",
+  "outputDirectory": "dist"
+}