Initial project scaffold for VS Vineyard mod

Sets up C# .NET 8 project with modinfo.json, ModSystem entry point,
full asset directory structure, .gitignore, and README.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

resources/assets/vsvineyard/lang/en.json

@@ -0,0 +1,8 @@
+{
+  "block-vsvineyard-grapevine-*": "Grape Vine",
+  "item-vsvineyard-grapes-*": "Grapes",
+  "item-vsvineyard-grapejuice": "Grape Juice",
+  "item-vsvineyard-wine-*": "Wine",
+  "block-vsvineyard-winebarrel": "Wine Barrel",
+  "block-vsvineyard-winepress": "Wine Press"
+}