chore: 更新版本号至0.0.2-snapshot.3，并修改命令前缀为'npx dpml-prompt@snapshot'

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dpml-prompt",
-  "version": "0.0.2-snapshot.2",
+  "version": "0.0.2-snapshot.3",
   "description": "DPML-powered AI prompt framework - Revolutionary AI-First CLI system based on Deepractice Prompt Markup Language. Build sophisticated AI agents with structured prompts, memory systems, and execution frameworks.",
   "main": "src/lib/index.js",
   "bin": {