Add proxies feature

[sjmiller609]

TL;DR

This PR introduces a new proxies command, allowing users to create, list, get, and delete various types of proxies. The browsers create command is also updated to allow launching a browser session with a specified proxy.

Why we made these changes

To provide users with integrated tools for managing and utilizing proxies directly within the CLI. This simplifies workflows that require running browser sessions from different geolocations or under specific network configurations, removing the need for external proxy management.

What changed?

• New proxies Command (cmd/proxies/):
  • Introduced a new command for full lifecycle management of proxies (proxies.go, types.go).
  • create: Added functionality to create various proxy types (datacenter, residential, etc.) with validation (create.go).
  • list: Implemented a command to display all configured proxies in a formatted table (list.go).
  • get: Added a command to retrieve and display detailed information for a single proxy by ID (get.go).
  • delete: Implemented a command to remove a proxy with an interactive confirmation prompt (delete.go).
• Browser Integration (cmd/browsers.go):
  • Updated the browsers create command with a --proxy-id flag to attach a managed proxy to a new browser session.
• CLI Integration (cmd/root.go):
  • Registered the new proxies command into the root CLI application.
• Dependencies (go.mod, go.sum):
  • Updated module dependencies to support the new functionality.

Validation

• Comprehensive Unit Tests (cmd/proxies/*_test.go):
  • Added extensive tests for all proxies subcommands, covering successful creation, retrieval, listing, and deletion of all supported proxy types.
  • Ensured robust error handling for invalid input, missing fields, and API failures.
• Mock Service (cmd/proxies/common_test.go):
  • Implemented a FakeProxyService to mock API interactions, ensuring reliable and isolated testing.

^{Description generated by Mesa. Update settings}

[masnwilliams]

lgtm