tools: Add `export_emoji_names_to_csv`.
tools: Add `export_emoji_names_to_csv`.

This tool is used for exporting `emoji_names.py` to a csv file.

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