Add examples catalog with subcommand dispatch

- Extract game engine from package main to engine/ library package
- Create examples/ package with registry, Entry type, and BuilderDeps
- Register default world as an example (moved from main())
- Add combat example: two teams of units facing each other
- Rewrite main.go as thin dispatch: go run . example [name]
- Update README with examples catalog one-liner

1 files changed, 0 insertions, 20 deletions

diff --git a/resource.go b/resource.go
deleted file mode 100644
index 5fb48ae..0000000
--- a/resource.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package main
-
-import (
-	"time"
-
-	"age_of_empires/ecs"
-)
-
-type ResourceSource struct {
-	Remaining int
-}
-
-type ResourceGatherer struct {
-	MaxCapacity    int
-	CurrentVolume  int
-	Source         ecs.Entity
-	LastPickupTime time.Time
-}
-
-type ResourceStorage struct{}