Add proxy update

[AHarmlessPyro]

Note

Medium Risk
Adds a new session update path for proxy configuration (enable/disable, static IP, location), which could affect how running sessions route traffic if misused. Changes are localized to the SDK surface area and model serialization.

Overview
Adds support for updating a running session’s proxy configuration via new SessionManager.update_proxy_params() methods in both sync and async clients, sending type: "proxy" updates to /session/{id}/update.

Introduces new Pydantic request models UpdateSessionProxyParams (with optional staticIpId and location) and UpdateSessionProxyLocationParams (country/state/city), and exports them from hyperbrowser.models.

Bumps the SDK version to 0.88.0 and cleans up a couple unused imports.

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