Fix "Fix Imports" [GH-7546]

[junichi11]

• Fix imports proposes incorrect class (name mismatch) #7546
• Compare segments of namespace names to avoid adding incorrect items
• Add a unit test

Example:

<?php
namespace NS1;

class TestClass {}
class TestClass2TestClass {}
interface TestInterface {}
interface TestInterface2TestInterface {}
trait TestTrait {}
trait TestTrait2TestTrait {}
enum TestEnum {
    case Test;
}
enum TestEnum2TestEnum {
    case Test;
}

const CONSTANT = 1;
const CONSTANT2CONSTANT = 2;

function func(): void {}
function func2func(): void {}

namespace NS1\Sub1\Sub2\Sub3;

class TestClass {}
class TestClass2TestClass {}
interface TestInterface {}
interface TestInterface2TestInterface {}
trait TestTrait {}
trait TestTrait2TestTrait {}
enum TestEnum {
    case Test;
}
enum TestEnum2TestEnum {
    case Test;
}

const CONSTANT = 1;
const CONSTANT2CONSTANT = 2;

function func(): void {}
function func2func(): void {}

namespace Test;

class GH7546 { // Fix Imports here
    private TestClass $testClass1;
    private NS1\Sub1\TestClass $testClass2;
    private TestInterface $testInterface;
    private \NS1\Sub1\Sub2\Sub3\TestInterface $testInterface2;

    public const CONSTANT = TestEnum::Test;
    public const int CONSTANT2 = CONSTANT;

    use TestTrait;

    public function test(): void {
        func();
    }
}

Before:

After:

[tmysik]

👍