fix(bedrock): improve AWS credential handling and add model definitions (#826)

* fix(bedrock): improve AWS credential handling and add model definitions

- Change error to warning when AWS credentials are missing in environment
- Allow fallback to system configuration (aws config files or instance profiles)
- Remove hardcoded region and profile parameters in Bedrock client
- Add Claude 3.7 Sonnet and DeepSeek R1 model definitions for Bedrock
- Update config manager to properly handle Bedrock provider

* chore: cleanup and format and small refactor

---------

Co-authored-by: Ray Krueger <raykrueger@gmail.com>

scripts/modules/commands.js

@@ -572,9 +572,9 @@ async function runInteractiveSetup(projectRoot) {
 				!process.env.AWS_ACCESS_KEY_ID ||
 				!process.env.AWS_SECRET_ACCESS_KEY
 			) {
-				console.error(
-					chalk.red(
-						'Error: AWS_ACCESS_KEY_ID and/or AWS_SECRET_ACCESS_KEY environment variables are missing. Please set them before using custom Bedrock models.'
+				console.warn(
+					chalk.yellow(
+						'Warning: AWS_ACCESS_KEY_ID and/or AWS_SECRET_ACCESS_KEY environment variables are missing. Will fallback to system configuration. (ex: aws config files or ec2 instance profiles)'
 					)
 				);
 				setupSuccess = false;