build_emoji: Add `generate_sprite_css_files()` function.
build_emoji: Add `generate_sprite_css_files()` function.

hackerkid/zulip,brockwhittaker/zulip,brainwane/zulip,showell/zulip,rishig/zulip,verma-varsha/zulip,Galexrt/zulip,brockwhittaker/zulip,kou/zulip,dhcrzf/zulip,verma-varsha/zulip,andersk/zulip,timabbott/zulip,dhcrzf/zulip,rht/zulip,shubhamdhama/zulip,eeshangarg/zulip,synicalsyntax/zulip,amanharitsh123/zulip,mahim97/zulip,rht/zulip,amanharitsh123/zulip,synicalsyntax/zulip,brainwane/zulip,punchagan/zulip,eeshangarg/zulip,showell/zulip,timabbott/zulip,hackerkid/zulip,dhcrzf/zulip,eeshangarg/zulip,jackrzhang/zulip,zulip/zulip,shubhamdhama/zulip,brockwhittaker/zulip,jackrzhang/zulip,synicalsyntax/zulip,zulip/zulip,mahim97/zulip,rishig/zulip,synicalsyntax/zulip,punchagan/zulip,timabbott/zulip,timabbott/zulip,jackrzhang/zulip,punchagan/zulip,verma-varsha/zulip,zulip/zulip,zulip/zulip,punchagan/zulip,rht/zulip,Galexrt/zulip,brainwane/zulip,tommyip/zulip,amanharitsh123/zulip,tommyip/zulip,brainwane/zulip,verma-varsha/zulip,zulip/zulip,shubhamdhama/zulip,amanharitsh123/zulip,mahim97/zulip,brockwhittaker/zulip,mahim97/zulip,mahim97/zulip,kou/zulip,synicalsyntax/zulip,andersk/zulip,rht/zulip,Galexrt/zulip,showell/zulip,shubhamdhama/zulip,brainwane/zulip,andersk/zulip,eeshangarg/zulip,showell/zulip,timabbott/zulip,rishig/zulip,amanharitsh123/zulip,synicalsyntax/zulip,rht/zulip,brainwane/zulip,andersk/zulip,amanharitsh123/zulip,jackrzhang/zulip,shubhamdhama/zulip,timabbott/zulip,showell/zulip,jackrzhang/zulip,andersk/zulip,dhcrzf/zulip,timabbott/zulip,eeshangarg/zulip,verma-varsha/zulip,dhcrzf/zulip,eeshangarg/zulip,dhcrzf/zulip,zulip/zulip,rishig/zulip,kou/zulip,andersk/zulip,andersk/zulip,kou/zulip,Galexrt/zulip,mahim97/zulip,verma-varsha/zulip,jackrzhang/zulip,rishig/zulip,jackrzhang/zulip,eeshangarg/zulip,shubhamdhama/zulip,Galexrt/zulip,tommyip/zulip,Galexrt/zulip,hackerkid/zulip,showell/zulip,showell/zulip,kou/zulip,synicalsyntax/zulip,brockwhittaker/zulip,punchagan/zulip,tommyip/zulip,tommyip/zulip,rht/zulip,hackerkid/zulip,brockwhittaker/zulip,brainwane/zulip,zulip/zulip,hackerkid/zulip,tommyip/zulip,Galexrt/zulip,dhcrzf/zulip,punchagan/zulip,rishig/zulip,tommyip/zulip,rht/zulip,hackerkid/zulip,kou/zulip,shubhamdhama/zulip,kou/zulip,rishig/zulip,hackerkid/zulip,punchagan/zulip