Hyp3lib

Changed
* `hyp3lib` now uses a `src` layout per this [recommendation](https://packaging.python.org/en/latest/discussions/src-layout-vs-flat-layout/).
* `hyp3lib` now only uses `pyproject.toml` for package creation now that `setuptools` recommends [not using setup.py](https://setuptools.pypa.io/en/latest/userguide/quickstart.html#setuppy-discouraged).
* Updated GitHub Actions to current HyP3 standards.
* Updated formatting using Ruff to pass flake8 check.

Remove
* Support for Python 3.7 and 3.8 has been dropped in line with NumPy and the larger scientific python ecosystem, as described in [NEP-0029](https://numpy.org/neps/nep-0029-deprecation_policy.html) and [SEPC-0000](https://scientific-python.org/specs/spec-0000/)
* All hyp3lib functionality not currently being used by one of these GitHub orgs: ASFHyP3, asfadmin, ASFOpenSARLab, access-cloud-based-insar, dbekaert, ASFBinderRecipes, or insarlab. For a full list of the deleted files, see [here](https://github.com/ASFHyP3/hyp3-lib/pull/286).
* Removed now unused dependencies from `pyproject.toml` and `environment.yml`.

Fixed
* Install `build` dependency to fix `distribute` action.

Fixed
* `distribute` action to use updated version similar to `hyp3-sdk`

Added
* Added warning to `README.md` that use of this repository is no longer recommended until the `v3.0.0` release.
* `fetch.download_file` now supports Bearer authentication via a new `token` parameter
Changed
* `get_orb.downloadSentinelOrbitFile` now queries the new Copernicus Data Space Ecosystem for the `ESA` provider.
A new `esa_credentials` parameter must be provided when using the `ESA` provider.

Removed
* Python 3.6 is no longer supported

Fixed
* `JSONDecodeError` in `get_orb._get_esa_orbit_url`

Changed
* `conda-env.yml` has been renamed to `environment.yml` in-line with community practice
* `scene.get_download_url` now returns sentinel1.asf.alaska.edu URLs rather than cloudfront.net URLs