feat(providers): add oswe-vscode-prime model for GitHub Copilot

[DanRioDev]

I added the exclusive Raptor Mini (oswe-vscode-prime) model configuration for GitHub Copilot, it is a Github's tuned GPT-5-mini.

The specs are the same from GPT‑5 mini, and also set the Free tier pricing multiplier as it is.

I ran bun validate to confirm everything is valid.

[Copilot]

Pull request overview

This PR adds a new model configuration for GitHub Copilot called "Raptor Mini" (oswe-vscode-prime), described as GitHub's tuned version of GPT-5-mini. The configuration includes model specifications such as context limits, supported modalities, and pricing information.

Changes:

• Added oswe-vscode-prime.toml configuration file for the Raptor Mini model with specifications matching GPT-5-mini

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[Copilot]

The pricing configuration is inconsistent with all other GitHub Copilot models. All existing GitHub Copilot models have input = 0 and output = 0 to represent free tier pricing, but this model has input = 1 and output = 1. This should be changed to match the established pattern for GitHub Copilot models.

[rekram1-node]

This model is not meant to be used outside of vscode, we have intentionally removed this model

They asked for it to not be added to models.dev