dark-mode: Add pigments support for dark mode.
dark-mode: Add pigments support for dark mode.

This adds support for dark mode pygments that are good syntax
highlighting colors to be seen on a dark background.

zulip/zulip,shubhamdhama/zulip,showell/zulip,zulip/zulip,eeshangarg/zulip,timabbott/zulip,kou/zulip,shubhamdhama/zulip,eeshangarg/zulip,brainwane/zulip,rishig/zulip,dhcrzf/zulip,brainwane/zulip,andersk/zulip,punchagan/zulip,dhcrzf/zulip,andersk/zulip,hackerkid/zulip,rht/zulip,tommyip/zulip,shubhamdhama/zulip,rht/zulip,synicalsyntax/zulip,rishig/zulip,synicalsyntax/zulip,zulip/zulip,timabbott/zulip,eeshangarg/zulip,jackrzhang/zulip,rishig/zulip,timabbott/zulip,hackerkid/zulip,eeshangarg/zulip,shubhamdhama/zulip,eeshangarg/zulip,jackrzhang/zulip,andersk/zulip,timabbott/zulip,synicalsyntax/zulip,synicalsyntax/zulip,jackrzhang/zulip,mahim97/zulip,showell/zulip,tommyip/zulip,tommyip/zulip,timabbott/zulip,brainwane/zulip,punchagan/zulip,mahim97/zulip,zulip/zulip,dhcrzf/zulip,showell/zulip,shubhamdhama/zulip,rht/zulip,eeshangarg/zulip,punchagan/zulip,punchagan/zulip,mahim97/zulip,dhcrzf/zulip,tommyip/zulip,kou/zulip,showell/zulip,showell/zulip,showell/zulip,dhcrzf/zulip,andersk/zulip,dhcrzf/zulip,synicalsyntax/zulip,kou/zulip,timabbott/zulip,mahim97/zulip,shubhamdhama/zulip,dhcrzf/zulip,jackrzhang/zulip,brainwane/zulip,rht/zulip,kou/zulip,andersk/zulip,hackerkid/zulip,mahim97/zulip,kou/zulip,rht/zulip,synicalsyntax/zulip,hackerkid/zulip,brainwane/zulip,showell/zulip,mahim97/zulip,brainwane/zulip,brainwane/zulip,rht/zulip,rishig/zulip,hackerkid/zulip,andersk/zulip,punchagan/zulip,andersk/zulip,tommyip/zulip,punchagan/zulip,zulip/zulip,synicalsyntax/zulip,kou/zulip,tommyip/zulip,rishig/zulip,zulip/zulip,hackerkid/zulip,tommyip/zulip,timabbott/zulip,rishig/zulip,hackerkid/zulip,jackrzhang/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,zulip/zulip,shubhamdhama/zulip,jackrzhang/zulip,jackrzhang/zulip,rishig/zulip,punchagan/zulip