chore: bump @electron/get to v5, migrate to got v15, fix audit vulnerabilities (#44)

* chore: bump @electron/get to v5, add got as direct dep, fix audit vulnerabilities

Agent-Logs-Url: https://github.com/microsoft/vscode-gulp-electron/sessions/671801c3-c5dd-4078-aca7-11bbb0a65a77

Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

* chore: migrate got to v15, update require to use default export

Agent-Logs-Url: https://github.com/microsoft/vscode-gulp-electron/sessions/94aad30c-aaff-4279-ba86-974201a271d2

Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

Author: Copilot