Add NPM package, debs, rpms and refactor CI/build process

Closes many issues that I'll prune after adding more docs
for users.

ci/build/build-vscode.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Builds vscode into lib/vscode/out-vscode.
+
+# MINIFY controls whether a minified version of vscode is built.
+MINIFY=${MINIFY-true}
+
+main() {
+  cd "$(dirname "${0}")/../.."
+  cd lib/vscode
+
+  yarn gulp compile-build
+  yarn gulp compile-extensions-build
+  yarn gulp optimize --gulpfile ./coder.js
+  if [[ $MINIFY ]]; then
+    yarn gulp minify --gulpfile ./coder.js
+  fi
+}
+
+main "$@"