feat(tasks): create a task execution framework

## Description

Creating custom tasks allows users to write more sophisticated workflows for complex deployment scenarios with multiple contracts depending on each other.

## Technical Details

Add a new `tasks` command, allowing users to create and run custom jobs written in Javascript or Typescript. Those tasks should have a set of internal functionalities from the CLI exposed to the script as an API.

## References

- [Hardhat tasks](https://hardhat.org/hardhat-runner/docs/guides/tasks-and-scripts)

Start by reviewing the existing CLI command structure and the Hardhat tasks reference linked in the issue. The work is complete when users can create and run custom JavaScript or TypeScript tasks through a new tasks command, with the CLI's internal functionality exposed as an API.

Written by the indexing model from the issue text.