chore: include pre-built dist for github install

dist/agents/env-context.d.ts

@@ -0,0 +1,7 @@
+/**
+ * Creates OmO-specific environment context (timezone, locale).
+ * Note: Working directory, platform, and date are already provided by OpenCode's system.ts,
+ * so we only include fields that OpenCode doesn't provide to avoid duplication.
+ * See: https://github.com/code-yeongyu/oh-my-openagent/issues/379
+ */
+export declare function createEnvContext(): string;