ci: Add release workflow

[edgarrmondragon]

In preparation for #70

[edgarrmondragon]

The dbt files are currently missing:

dbt_ext-0.2.0.post6.dev0+f94cf94
├── dbt_ext
│   ├── __init__.py
│   ├── extension.py
│   ├── main.py
│   └── pass_through.py
└── dbt_ext-0.2.0.post6.dev0+f94cf94.dist-info
    ├── LICENSE
    ├── METADATA
    ├── RECORD
    ├── WHEEL
    └── entry_points.txt

2 directories, 9 files

Investigating how to tell Poetry to add them to the wheel.

[edgarrmondragon]

The sdist and wheel look OK, and I can confirm dbt_extension initialize works with the new layout.

https://github.com/meltano/dbt-ext/actions/runs/10200577490?pr=71