feat(watch): watchImmediate and watchDeep support overloads

[Mini-ghost]

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

---

Description

Currently, the type for watchImmediate and watchDeep do not allow passing an array of multiple data sources. This PR addresses this issue by using overloads."

---

🤖 Generated by Copilot at c6bd046

This pull request improves the functionality and organization of the watchDeep and watchImmediate functions, which allow reactive watchers for deep or immediate changes. It introduces a new type MultiWatchSources to handle multiple sources, and moves the functions to separate files under packages/shared.

🤖 Generated by Copilot at c6bd046

• Add watchDeep and watchImmediate functions to support watching multiple sources with deep or immediate options (link, link, link)
• Use overloads with MapSources, MapOldSources, and Immediate types to infer source and callback types and omit redundant options (link, link)
• Use fallback functions with default generic parameters, any casts, and relaxed source constraints to handle any arguments (link, link)
• Move watchDeep and watchImmediate functions from their original files to packages/shared/utils/types.ts for better organization (link, link)