Remove material-icons-extended as a dependency of compose-material-dialogs:core and others

[yankeppey]

Describe the bug
After I added compose-material-dialogs:core to my project, 20 mb was added to the final apk size. It seems it brought the whole material-icons-extended library with it:

 +--- io.github.vanpra.compose-material-dialogs:core:0.7.0
|    |    |    +--- androidx.core:core-ktx:1.7.0 (*)
|    |    |    +--- androidx.compose.ui:ui:1.1.1 (*)
|    |    |    +--- androidx.compose.material:material:1.1.1 (*)
|    |    |    +--- androidx.compose.material:material-icons-extended:1.1.1
|    |    |    |    +--- androidx.compose.material:material-icons-core:1.1.1 (*)
|    |    |    |    +--- org.jetbrains.kotlin:kotlin-stdlib-common:1.6.10
|    |    |    |    \--- androidx.compose.runtime:runtime:1.1.1 (*)
|    |    |    +--- androidx.compose.animation:animation:1.1.1 (*)
|    |    |    +--- androidx.compose.foundation:foundation-layout:1.1.1 (*)
|    |    |    \--- org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.10 (*)

Expected behaviour
I don't expect a library showing dialogs to bring any icons with it, and for sure it should not depend on the extended set of the material icons.

Suggested solution

• This seems to be the reason, the same set of dependenies is applied to every library:
  https://github.com/vanpra/compose-material-dialogs/blob/main/buildSrc/src/main/kotlin/CommonModulePlugin.kt#L29

The material icons are used in several places, such as: Demos, Tests, and in a couple of places in DatePicker module.
Let's leave the dependency of material-icons-extended only for Demos and Tests, and for DatePicker, let's copy-paste the used icons, as suggested in the docs:

Due to the very large size of this library, make sure to use R8/Proguard to strip unused icons if you are including this library as a direct dependency. Alternatively you can make a local copy (by copy and pasting) the icon(s) you wish to keep, or using Android Studio's 'Import vector asset' feature.

[PranavMaganti]

Fixed in 0.8.1-rc