chore: import upstream snapshot with attribution

pkg/github/inventory.go

@@ -0,0 +1,18 @@
+package github
+
+import (
+	"github.com/github/github-mcp-server/pkg/inventory"
+	"github.com/github/github-mcp-server/pkg/translations"
+)
+
+// NewInventory creates an Inventory with all available tools, resources, and prompts.
+// Tools, resources, and prompts are self-describing with their toolset metadata embedded.
+// This function is stateless - no dependencies are captured.
+// Handlers are generated on-demand during registration via RegisterAll(ctx, server, deps).
+// The "default" keyword in WithToolsets will expand to toolsets marked with Default: true.
+func NewInventory(t translations.TranslationHelperFunc) *inventory.Builder {
+	return inventory.NewBuilder().
+		SetTools(AllTools(t)).
+		SetResources(AllResources(t)).
+		SetPrompts(AllPrompts(t))
+}