Added "Green Apple" theme (#5184)

* Added "Green Apple" theme

Totally not stolen from other forks.

Although to cover all my bases I co-author all people who adapted the theme in any form.

Neko, J2K and Tako

Co-Authored-By: Carlos <2092019+CarlosEsco@users.noreply.github.com>
Co-Authored-By: Jays2Kings <jays@outlook.com>
Co-Authored-By: CrepeTF <70870719+CrepeTF@users.noreply.github.com>

* Add black as the OnSecondary color

Co-authored-by: Carlos <2092019+CarlosEsco@users.noreply.github.com>
Co-authored-by: Jays2Kings <jays@outlook.com>
Co-authored-by: CrepeTF <70870719+CrepeTF@users.noreply.github.com>

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsGeneralController.kt

@@ -143,6 +143,7 @@ class SettingsGeneralController : SettingsController() {
                 entriesRes = arrayOf(
                     R.string.theme_dark_default,
                     R.string.theme_dark_blue,
+                    R.string.theme_dark_greenapple,
                     R.string.theme_dark_midnightdusk,
                     R.string.theme_dark_amoled,
                     R.string.theme_dark_amoled_hotpink
@@ -150,6 +151,7 @@ class SettingsGeneralController : SettingsController() {
                 entryValues = arrayOf(
                     Values.DarkThemeVariant.default.name,
                     Values.DarkThemeVariant.blue.name,
+                    Values.DarkThemeVariant.greenapple.name,
                     Values.DarkThemeVariant.midnightdusk.name,
                     Values.DarkThemeVariant.amoled.name,
                     Values.DarkThemeVariant.hotpink.name