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/netlify.toml

@@ -0,0 +1,16 @@
+[build]
+publish = "dist"
+command = "npm run build"
+
+[build.environment]
+NODE_VERSION = "20"
+
+[[redirects]]
+from = "/.well-known/*"
+to = "/.well-known/:splat"
+status = 200
+
+[[redirects]]
+from = "/*"
+to = "/index.html"
+status = 200