Publish v4 update.

[samchon]

This pull request includes various updates and improvements across multiple files, focusing on dependency updates, removal of unnecessary code, and enhancements to the documentation. The most important changes include updating dependencies, removing unused imports and assignments, and updating the documentation to reflect these changes.

Dependency Updates:

• benchmark/package.json: Updated @nestia/core to ^4.0.0, typia to ^7.0.0, and typescript to ~5.6.3. [1] [2] [3]
• package.json: Updated version to 4.0.0.
• packages/benchmark/package.json: Updated @nestia/core to ^4.0.0, @nestia/sdk to ^4.0.0, typescript to ~5.6.3, and typia to ^7.0.0.
• packages/core/package.json: Updated @nestia/core to 4.0.0, @samchon/openapi to ^2.0.0, typia to ^7.0.0, and removed multer. [1] [2]

Code Cleanup:

• packages/core/src/decorators/EncryptedBody.ts: Removed unused imports and assignments of is, assert, and validate from typia. [1] [2]
• packages/core/src/decorators/PlainBody.ts: Removed unused import and assignment of assert from typia. [1] [2]
• packages/core/src/decorators/TypedBody.ts: Removed unused imports and assignments of is, assert, misc, and validate from typia. [1] [2]
• packages/core/src/decorators/TypedFormData.ts: Removed fastify-multipart and updated to use fastify-multer. Removed unnecessary imports and assignments. [1] [2] [3] [4] [5] [6] [7] [8]

Documentation Updates:

• README.md and packages/core/README.md: Removed the mention of the "OpenAI function calling schema generator" from the list of features.

Miscellaneous:

• deploy/publish.js: Added code to remove package-lock.json if it exists before running npm install.
• Removed unused type export in packages/benchmark/test/api/Primitive.ts.

[samchon]

OK, no problem.