Scan more than one component at the time

[vivodikj]

Summary

This PR create an option for add more packages in scanning component feature, inspired by this issue. With this change, developers can use new @ComponetsScan annotation with values parameter where they can add all needed packages. The original @ComponentScan annotations is 100% preserved and now can cooperate with new @ComponetsScan.

All tests still passes like a charm and new test passed without any problem.

Examples

Before

@Module(includes = [DataModule::class])
@ComponentScan("org.koin.sample.androidx.app")
class AppModule

@Module(includes = [CommonModule::class, RepositoryModule::class])
@ComponentScan("org.koin.sample.androidx.data")
internal class DataModule

After 1. variant

@Module(includes = [CommonModule::class, RepositoryModule::class])
@ComponentsScan(values = ["org.koin.sample.androidx.app", "org.koin.sample.androidx.data"])
class AppModule

After 2. variant

@Module
@ComponentsScan(values = [
    "org.koin.sample.androidx.app", "org.koin.sample.androidx.data",
    "org.koin.sample.androidx.repository", "org.koin.sample.android.library",
])
class AppModule

After 1. variant if we want scan actual package

@Module
@ComponentsScan(values = [
    "", "org.koin.sample.androidx.app", "org.koin.sample.androidx.data",
    "org.koin.sample.androidx.repository", "org.koin.sample.android.library",
])
class AppModule

After 2. variant if we want scan actual package

@Module
@ComponentsScan
@ComponentsScan(values = [
    "org.koin.sample.androidx.app", "org.koin.sample.androidx.data",
    "org.koin.sample.androidx.repository", "org.koin.sample.android.library",
])
class AppModule

NOTE:

If dev use @ComponentsScan or @ComponentsScan([]) or @ComponentsScan([""]) this will scan actual package like original @ComponentScan.

If dev add non existing or correct package name to @ComponentsScan values, the package will be ignored and nothing happens.

If dev add multiple package names to @ComponentsScan values, only one will be used and multiple package names error is not shown.

[arnaudgiuliani]

let's go on branch v2 as it's a new feature / improvement proposal