fix(tests): need to require vim.treesitter upfront for tests

fix(tests): need to require vim.treesitter upfront for tests

fix: only ignore the main directory files

fix: root finder should look for settings.gradle file

Related to #185

fix: detect gradle project by settings file

Not every gradle project contains the build.gradle file in its base.
Should detect on settings file instead.

Fixes #184

feat: add TestFactory annotation

fix: throw error when trying to resolve a test class name from a non-…

…test file

fix: show output there was an unexpected error in the test execution

fix(resolve_qualified_name): null pointer when package is empty (#167)

Fix a null pointer when the test class has no package at all.

Example file:

```java
// file:  ExampleTest.java
class ExampleTest {
}
```

it should return **"ExampleTest"**

fix: multiple classes at level zero (#164)

Fixes #161 

The problem was that there were several classes in the same test file at
level zero and the first was being taken.

Example:

```java
// Filename: ApplicationTests.java

@TestConfiguration
class TestConfig {
    @bean
    public String someBean() {
        return "some bean";
    }
}

@SpringBootTest
class ApplicationTests {

    @test
    void contextLoads() {
    }

}
```

It was resolved by filtering non-test class names.