feat(multienv): Add multi-env templates enabling TypeScript decorators for Bun and Deno; rename npmextra config key to szci

assets/templates/multienv/bunfig.toml

@@ -0,0 +1,13 @@
+# Bun configuration for tstest
+# This enables TypeScript decorator support in Bun runtime
+
+[build]
+target = "bun"
+
+[test]
+preload = []
+
+# Enable decorators for Bun's TypeScript transpiler
+# This ensures user code with decorators works when executed via Bun
+[transpiler]
+experimentalDecorators = true

assets/templates/multienv/deno.json

@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "experimentalDecorators": true,
+    "lib": ["ES2022", "DOM"],
+    "target": "ES2022"
+  },
+  "nodeModulesDir": true
+}