feat: add AddEasyScrutorForThisAssembly extension method

[Copilot]

Adds a new extension method for scanning and registering services from only the calling assembly, providing a targeted alternative to scanning all dependency context assemblies.

Changes

• New method: AddEasyScrutorForThisAssembly() uses Assembly.GetCallingAssembly() with Scrutor's FromAssemblies() to scan only the calling assembly
• Test coverage: 10 tests covering all lifetime interfaces, scope behavior, duplicate prevention, and assembly targeting

Usage

// Scans only the assembly containing this call
builder.Services.AddEasyScrutorForThisAssembly();

// vs scanning all assemblies
builder.Services.AddEasyScrutor();

// vs filtering by name pattern
builder.Services.AddEasyScrutorForAssembliesStartingWith("MyApp");

Useful for improved startup performance and explicit service registration boundaries.

Original prompt

Create a new AddEasyScrutorForThisAssembly. include tests.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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