Add files for building and publishing NPM and PyPi package

[MantisClone]

Towards #348

Changes proposed in this PR:

• Add npm-publish workflow
• Add python-publish workflow. This workflow edits the artifacts/ directory to contain valid python modules.
  • Fix directory names by replacing . with _
  • Add __init__.py files to every directory
• Add files for building and publishing python package
  • pyproject.toml is needed for the python -m build command to work
  • setup.cfg defines the PyPi metadata and directories to include in the sdist/wheel
• Update version format to v1.0.0-alpha.1. See for details: Release an alpha version of the Ocean Contracts to PyPi #348 (comment)
• Added .bumpversion.cfg and bumpversion.sh script to keep the npm and python package versions in sync

Reusable Workflows

This PR makes the ci workflow "reusable" meaning it can be called from other workflows (even ones in other repositories). Both the npm-publish and python-publish workflows call the ci workflow.

The reference to a workflow must be a valid branch, tag, or commit, so I've selected v4main as the ref. But, the ci workflow on v4main is currently not reusable, and so the npm/python-publish workflows fail with the following error:

handling usage of workflow "oceanprotocol/contracts/.github/workflows/ci.yml@v4main": workflow is not callable as it is missing a `on.workflow_call` trigger

This error will be resolved once this PR is merged to v4main.

Python Package Contents

The sdist and wheel packages contain identical contents, shown below.

├── addresses
│   ├── address.json
│   └── __init__.py
├── artifacts
│   ├── contracts
│   │   ├── communityFee
│   │   │   ├── __init__.py
│   │   │   └── OPFCommunityFeeCollector_sol  <- Notice the `_` instead of `.`
│   │   │       ├── __init__.py
│   │   │       ├── OPFCommunityFeeCollector.dbg.json
│   │   │       └── OPFCommunityFeeCollector.json

... directory contents omitted for brevity, mirror the structure of communityFee seen above
│   ├── @balancer-labs
│   ├── build-info
│   ├── hardhat
│   ├── __init__.py
│   ├── @openzeppelin
│   └── solidity-bytes-utils
...

├── ocean_contracts.egg-info
│   ├── dependency_links.txt
│   ├── PKG-INFO
│   ├── SOURCES.txt
│   └── top_level.txt
├── PKG-INFO
├── pyproject.toml
├── README.md
└── setup.cfg

[MantisClone]

@alexcos20 requested change: Only execute the python-publish workflow if all the CI tests pass. EDIT: We hacked together a first attempt. I still need to clean it up and test it.

[MantisClone]

I believe this PR is complete and ready to be reviewed.

[MantisClone]

@alexcos20 requested change: Add bump version script to keep NPM version and PyPi version in sync.

[MantisClone]

@alexcos20
Per your request, I've added bumpversion files to keep npm and python version numbers in sync.

I also fixed a bug where the sdist package contained the address.json file, but the wheel package did not. Now, both the sdist and the wheel package contain the address.json

And finally, I merged #367 into this branch because the presence of the coverage/ directory was messing up the CI coverage workflow. EDIT: Unfortunately, that means this PR is difficult to review because there are over a hundred files deleted. Once #367 is merged, this PR will be easier to review.