feat: enhance package exports for better module resolution

[meabed]

Summary

• Added comprehensive exports field to package.json for better module resolution
• Enhanced support for subpath imports allowing cleaner module access
• Fixed main and types paths to correctly point to dist directory

Changes

• Enhanced package.json exports field: Added subpath exports for /api, /configuration, /base, and /common
• TypeScript support: Proper types exports for all subpaths
• Optimized package size: Added files field to include only necessary files in npm package
• Documentation: Updated CHANGELOG.md with all changes

Benefits

Users can now import the SDK modules in multiple ways:

// Main import
import { DevMeClient } from '@devmehq/sdk-js';

// Specific subpath imports
import { Configuration } from '@devmehq/sdk-js/configuration';
import { BaseAPI } from '@devmehq/sdk-js/base';

Test plan

• Build the project successfully
• Verify exports work with CommonJS require
• Verify exports work with ES modules import
• TypeScript types resolve correctly for all subpaths

[github-actions]

🎉 This PR is included in version 1.2.0-beta.1 🎉

The release is available on:

• npm package (@develop dist-tag)
• GitHub release

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