Checksum fingerprinting

### Is there an existing feature request for this?

- [X] I have searched the existing issues.

### Command

_No response_

### Description

Task is able to reduce running commands multiple times needlessly with [checksum fingerprinting](https://github.com/go-task/task/blob/master/docs/usage.md#by-fingerprinting-locally-generated-files-and-their-sources). This feature is missed in Melos.

### Reasoning

This would allow us to skip unnecessary task running, especially for things like `pub get` or `pub run build_runner build`

### Additional context and comments

_No response_

Start by comparing Melos task execution with the checksum fingerprinting behavior described in the linked Task documentation. Define how locally generated files and their sources should be tracked, including cases such as `pub get` and `pub run build_runner build`; done means unnecessary task runs are skipped when inputs have not changed.

Written by the indexing model from the issue text.