Refactor

This version represents a major refactor and introduces breaking changes.

1. The dependency on sigv4 has been removed due to excessive dependencies, including the problematic balls dependency, which caused numerous breaks in dependencies.

2. A new sigv4 dependency, named awsSigV4, has been introduced. It relies on only one external package.

3. Flaky asynchronous procedures have been removed, improving the overall stability.

4. Two new ways of handling credentials have been implemented:
   a. Use the awsSTScreate procedure to retrieve credentials.
   b. Store credentials in a global variable for access across threads, with automatic renewal using the stsGet procedure.
   These procedures are now split into different imports: awsSTS and awsSTS/sts.

5. Core procedures have been renamed for clarity and consistency.