Update @github/copilot to 1.0.46 (#1270)

* Update @github/copilot to 1.0.46

- Updated nodejs and test harness dependencies
- Re-ran code generators
- Formatted generated code

* Add missing model_picker fields to Rust test fixtures

The 1.0.46 update added `model_picker_category` and
`model_picker_price_category` fields to the `Model` type. Update the
Rust test fixtures in lib.rs and tests/e2e/client.rs to initialize these
new fields so clippy passes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Timothy Clem <timothy.clem@gmail.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 3 people

dotnet/src/Generated/Rpc.cs

@@ -56,7 +56,7 @@
     "author": "GitHub",
     "license": "MIT",
     "dependencies": {
-        "@github/copilot": "^1.0.45",
+        "@github/copilot": "^1.0.46",
         "vscode-jsonrpc": "^8.2.1",
         "zod": "^4.3.6"
     },