Merge pull request 'Add Dark Elephant theme' (#289) from s1m/Fedilab:theme/dark-elephant into main

Reviewed-on: https://codeberg.org/tom79/Fedilab/pulls/289

app/src/main/assets/themes/contributors/Fedilab_theme_Dark_Elephant.csv

@@ -0,0 +1,15 @@
+base_theme,0
+author,S1m
+name,Dark Elephant
+theme_boost_header_color,-13552317
+theme_text_header_1_line,-3479297
+theme_text_header_2_line,-7287815
+theme_statuses_color,-13552317
+theme_link_color,-11098143
+theme_icons_color,-789517
+pref_color_background,-14144456
+pref_color_navigation_bar,true
+pref_color_status_bar,true
+theme_accent,-13922086
+theme_text_color,-789517
+theme_primary,-14144456