tools: Add TypeScript to the dependency visualizer.
tools: Add TypeScript to the dependency visualizer.

The dependency visualizer currently only supports JavaScript files,
such as in the `get_js_edges` function, where only the ".js" extension
is supported. Update the visualizer to support ".ts" files as well and
to output modules without their extensions.

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