Remove vLatest concept and associated files

Remove the concept of "vLatest" throughout the codebase to encourage use of McpbManifestAny which supports all manifest versions. Changes include:

- Delete src/schemas/latest.ts and src/schemas_loose/latest.ts
- Remove vLatest and latest-related exports from schema index files
- Remove McpbManifestLatest type, replace McpbManifest to point to McpbManifestAny
- Remove LATEST_MANIFEST_VERSION, LATEST_MANIFEST_SCHEMA constants
- Update all main export files (index.ts, cli.ts, node.ts) to export from 0.3.js instead of latest.js
- Update tests to use v0_3.McpbManifestSchema explicitly
- Add @deprecated annotation to McpbManifest directing users to McpbManifestAny

This encourages better version compatibility by using the union type that supports all manifest versions rather than assuming a single "latest" version.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/types.ts

@@ -8,14 +8,13 @@ import type {
   McpbManifestPlatformOverrideSchema,
   McpbManifestPromptSchema,
   McpbManifestRepositorySchema,
-  McpbManifestSchema,
   McpbManifestServerSchema,
   McpbManifestToolSchema,
   McpbSignatureInfoSchema,
   McpbUserConfigurationOptionSchema,
   McpbUserConfigValuesSchema,
   McpServerConfigSchema,
-} from "./schemas/latest.js";
+} from "./schemas/0.3.js";
 
 export type McpServerConfig = z.infer<typeof McpServerConfigSchema>;
 
@@ -47,22 +46,16 @@ export type McpbUserConfigurationOption = z.infer<
 
 export type McpbUserConfigValues = z.infer<typeof McpbUserConfigValuesSchema>;
 
-/**
- * McpbManifest type for the latest manifest version only
- * Use this when you specifically need the latest version.
- */
-export type McpbManifestLatest = z.infer<typeof McpbManifestSchema>;
-
-/**
- * Alias for McpbManifestLatest for backwards compatibility.
- */
-export type McpbManifest = McpbManifestLatest;
-
 /**
  * McpbManifest type representing the union of all manifest versions
  */
 export type McpbManifestAny = z.infer<typeof McpbManifestSchemaAny>;
 
+/**
+ * @deprecated Use McpbManifestAny instead to support all manifest versions.
+ */
+export type McpbManifest = McpbManifestAny;
+
 /**
  * Information about a MCPB package signature
  */