feat: Add DeepSeek-R1 (deepseek-reasoner) support (#1355)

* feat: Add DeepSeek-R1 (deepseek-reasoner) support

- Add new deepseek-reasoner model with proper pricing info
- Fix temperature parameter being sent to unsupported deepseek-reasoner model
- Improve model selection logic in DeepSeekHandler
- Update CHANGELOG with new features and fixes
- Bump version to 3.1.11

* style: apply prettier formatting to deepseek provider and api definitions

src/shared/api.ts

@@ -377,6 +377,16 @@ export const deepSeekModels = {
 		cacheWritesPrice: 0.14,
 		cacheReadsPrice: 0.014,
 	},
+	"deepseek-reasoner": {
+		maxTokens: 8_000,
+		contextWindow: 64_000,
+		supportsImages: false,
+		supportsPromptCache: true, // supports context caching, but not in the way anthropic does it (deepseek reports input tokens and reads/writes in the same usage report) FIXME: we need to show users cache stats how deepseek does it
+		inputPrice: 0, // technically there is no input price, it's all either a cache hit or miss (ApiOptions will not show this)
+		outputPrice: 2.19,
+		cacheWritesPrice: 0.55,
+		cacheReadsPrice: 0.14,
+	},
 } as const satisfies Record<string, ModelInfo>
 
 // Mistral