Pipeless 1.0

[miguelaeh]

Description of the change

This PR contains a major re-write of Pipeless from Python to Rust. We took advantage of these changes to support many features that were not possible with the previous architecture by re-designing the whole architecture. There have also been a significant performance increase and an important decrease in resource consumption.

Benefits

• Highly parallelized processing. Version 0.x was conditioned to deploy several workers for parallel processing. Version 1.x contains a single type of Pipeless node, running processing in parallel by default.
• Removed the need of configuring streams in a YAML file before running Pipeless.
• The App class was replaced by the concept of stage. Stages can be easily plugged and re-used as boxes.
• Multi-stream processing. Version 0.x supported a single stream at a time. Version 1.x supports any number of streams without significant overhead.
• Significant reduction in resources consumption. Version 0.x required a minimum of 3 processes to work, adding an extra process per level of parallelization. Version 1.x works on a single process, and dynamically distributes loads between processes when required.
• Multi-language support. The new architecture allows to support several languages for writing hooks. We are starting with Python and Rust.
• Significant performance increase. Some tests indicated 5x speed up with 25% of the resources, which computes a 20x performance increase.

Possible drawbacks

Applicable issues

• fixes #

Additional information

[miguelaeh]

Merging PR in order to test workflows, for some reason I can't run them from the branch using the GitHub CLI. Pending before release:

• Setup release workflows.
• Update container images.
• Update repo README.md