feat: Add dependency resolution logic for plugins

[kibertoad]

Checklist

• run npm run test && npm run benchmark --if-present
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[kibertoad]

want to improve the types of it

[Copilot]

Pull Request Overview

This PR adds dependency resolution logic for plugins by introducing a resolveDependencyFromApp function that allows plugins to resolve dependencies from the Fastify application's DI container.

• Added resolveDependencyFromApp helper function to resolve dependencies from the app's DI container
• Included test coverage for the new dependency resolution functionality
• Updated documentation with usage examples for plugin dependency injection

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

File	Description
lib/fastifyAwilixPlugin.js	Adds the resolveDependencyFromApp helper function and exports it
test/fastifyAwilixPlugin.test.js	Adds test coverage for the new dependency resolution functionality
README.md	Documents the new plugin dependency resolution feature with examples

[Copilot]

The import statement references FastifyDependencyProvider but the actual exported function is resolveDependencyFromApp. The import should be import { resolveDependencyFromApp } from '@fastify/awilix'.

Suggested change

	import { FastifyDependencyProvider } from '@fastify/awilix'
	import { resolveDependencyFromApp } from '@fastify/awilix'