Provide type declarations

For now users had to do it [manually](https://github.com/editor-js/image/blob/65969bb7d19b0ffbf64e2b51da1e13daa9f6f2d3/src/types/codexteam-icons.d.ts) which is not very user friendly.

We need to export types from the package

Start with the linked src/types/codexteam-icons.d.ts file and inspect how the package currently exposes its icons. Trace the package entry point and build metadata to determine where declarations must be exported. Done means consumers can import the package's types without manually copying the declaration file.

Written by the indexing model from the issue text.