Add Ports To Sandboxes (#1541)

<!-- This is an auto-generated description by cubic. -->
## Summary by cubic
Adds a ports parameter to Sandbox to pre-expose specific ports via
public URLs at creation. Defaults to [], and dynamic exposure via
instance.expose_port(port) still works.

<sup>Written for commit 8b233c7.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

Author: cooper-grc

sdk/src/beta9/abstractions/sandbox.py

@@ -116,6 +116,10 @@ class Sandbox(Pod):
                 # Docker daemon will be automatically started
                 instance.docker.run("hello-world")
                 ```
+        ports (Optional[List[int]]):
+            List of ports to expose from the sandbox. When specified, these ports will be accessible
+            via public URLs upon sandbox creation. Default is an empty list. You can also dynamically
+            expose ports at runtime using `instance.expose_port(port)`.
 
     Example:
         ```python
@@ -158,6 +162,7 @@ def __init__(
         block_network: bool = False,
         allow_list: Optional[List[str]] = None,
         docker_enabled: bool = False,
+        ports: Optional[List[int]] = [],
     ):
         self.debug_buffer = io.StringIO()
         self.sync_local_dir = sync_local_dir
@@ -177,6 +182,7 @@ def __init__(
             block_network=block_network,
             allow_list=allow_list,
             docker_enabled=docker_enabled,
+            ports=ports,
         )
 
     def debug(self):