feat(api): unify Bedrock provider using Runtime API

Problem:
The current Bedrock implementation uses the Bedrock SDK, which requires separate handling for different model types and doesn't provide a unified streaming interface.

Solution:
Integrate the Bedrock Runtime API to provide a single, unified interface for all Bedrock models (Claude and Nova) using the ConverseStream API. This eliminates the need for separate handlers while maintaining all existing functionality.

Key Changes:
- Refactored AwsBedrockHandler to use @aws-sdk/client-bedrock-runtime
- Enhanced bedrock-converse-format.ts to handle all content types and properly transform between Anthropic and Bedrock formats
- Maintained cross-region inference support with proper region prefixing
- Added support for prompt caching configuration
- Improved AWS credentials handling to better support default providers
- Added proper error handling and token tracking for all response types

Dependencies:
- Added @aws-sdk/client-bedrock-runtime for unified API access
- Removed @anthropic-ai/bedrock-sdk dependency

Testing:
- Verified message format conversion for all content types
- Tested cross-region inference functionality
- Validated streaming responses for both Claude and Nova models

This change simplifies the codebase by providing a single, consistent interface for all Bedrock models while maintaining full compatibility with existing features.

src/shared/api.ts

@@ -16,11 +16,14 @@ export interface ApiHandlerOptions {
 	openRouterApiKey?: string
 	openRouterModelId?: string
 	openRouterModelInfo?: ModelInfo
+	openRouterUseMiddleOutTransform?: boolean
 	awsAccessKey?: string
 	awsSecretKey?: string
 	awsSessionToken?: string
 	awsRegion?: string
 	awsUseCrossRegionInference?: boolean
+	awsusePromptCache?: boolean
+	awspromptCacheId?: string
 	vertexProjectId?: string
 	vertexRegion?: string
 	openAiBaseUrl?: string
@@ -33,7 +36,7 @@ export interface ApiHandlerOptions {
 	geminiApiKey?: string
 	openAiNativeApiKey?: string
 	azureApiVersion?: string
-	openRouterUseMiddleOutTransform?: boolean
+	useBedrockRuntime?: boolean // Force use of Bedrock Runtime API instead of SDK
 }
 
 export type ApiConfiguration = ApiHandlerOptions & {
@@ -105,9 +108,63 @@ export const anthropicModels = {
 
 // AWS Bedrock
 // https://docs.aws.amazon.com/bedrock/latest/userguide/conversation-inference.html
+export interface MessageContent {
+    type: 'text' | 'image' | 'video' | 'tool_use' | 'tool_result';
+    text?: string;
+    source?: {
+        type: 'base64';
+        data: string | Uint8Array; // string for Anthropic, Uint8Array for Bedrock
+        media_type: 'image/jpeg' | 'image/png' | 'image/gif' | 'image/webp';
+    };
+    // Video specific fields
+    format?: string;
+    s3Location?: {
+        uri: string;
+        bucketOwner?: string;
+    };
+    // Tool use and result fields
+    toolUseId?: string;
+    name?: string;
+    input?: any;
+    output?: any; // Used for tool_result type
+}
+
 export type BedrockModelId = keyof typeof bedrockModels
 export const bedrockDefaultModelId: BedrockModelId = "anthropic.claude-3-5-sonnet-20241022-v2:0"
 export const bedrockModels = {
+	"amazon.nova-pro-v1:0": {
+		maxTokens: 5000,
+		contextWindow: 300_000,
+		supportsImages: true,
+		supportsComputerUse: false,
+		supportsPromptCache: false,
+		inputPrice: 0.8,
+		outputPrice: 3.2,
+		cacheWritesPrice: 0.8, // per million tokens
+		cacheReadsPrice: 0.2, // per million tokens
+	},
+	"amazon.nova-lite-v1:0": {
+		maxTokens: 5000,
+		contextWindow: 300_000,
+		supportsImages: true,
+		supportsComputerUse: false,
+		supportsPromptCache: false,
+		inputPrice: 0.06,
+		outputPrice: 0.024,
+		cacheWritesPrice: 0.06, // per million tokens
+		cacheReadsPrice: 0.015, // per million tokens
+	},
+	"amazon.nova-micro-v1:0": {
+		maxTokens: 5000,
+		contextWindow: 128_000,
+		supportsImages: false,
+		supportsComputerUse: false,
+		supportsPromptCache: false,
+		inputPrice: 0.035,
+		outputPrice: 0.14,
+		cacheWritesPrice: 0.035, // per million tokens
+		cacheReadsPrice: 0.00875, // per million tokens
+	},
 	"anthropic.claude-3-5-sonnet-20241022-v2:0": {
 		maxTokens: 8192,
 		contextWindow: 200_000,
@@ -116,6 +173,9 @@ export const bedrockModels = {
 		supportsPromptCache: false,
 		inputPrice: 3.0,
 		outputPrice: 15.0,
+		cacheWritesPrice: 3.75, // per million tokens
+		cacheReadsPrice: 0.3, // per million tokens
+
 	},
 	"anthropic.claude-3-5-haiku-20241022-v1:0": {
 		maxTokens: 8192,
@@ -124,6 +184,9 @@ export const bedrockModels = {
 		supportsPromptCache: false,
 		inputPrice: 1.0,
 		outputPrice: 5.0,
+		cacheWritesPrice: 1.0,
+		cacheReadsPrice: 0.08,
+
 	},
 	"anthropic.claude-3-5-sonnet-20240620-v1:0": {
 		maxTokens: 8192,