MNT: xfail SRTM download test using bearer token

WIP: adapt codebase to use xradar, remove duplicated code

ENH: update tests to work with pooch, fix CI and requirements.txt

Fix GitHub badge in README.md

Fix GithHub release badge in README.md

MNT: add previous commit to .git-blame-ignore-revs, minor fixes (#616)

MNT: adapt to new black/ruff

MNT: update build-system, lint with ruff

New function for cross sections (RHI) from radar volume (#610)

* added 3D handling

xyz is an array of cartesian coordinates for every spherical coordinate, so the possible dimensions are (elevations, azimuths, range, 3). For 2d, it either has (elevations, range, 3) or (azimuths, range, 3) dimensions. For 3d, the only option is the full (elevations, azimuths, range, 3) dimensions. Thus, i think adding this two lines for the 3d case will not break other functionalities....

FIX: use `dtype=object` for creation of array with a sequence which has inhomogeneous shape

MNT: update CI action and micromamba version

ENH: delete tmp-files for VectorSource after closing (#609)

ENH: make Furuno reader read WRN110 scn data (format 103) (#606)

DOC: add explanations on boolean casting to docstring (#605)

MNT: update git, pyproject.toml, for use with new setuptools_scm

MNT: update CI actions, python versions

ENH: add upper/lower frequency kwargs to wradlib.clutter.histo_cut, return mask as unit8 with clutter==1 and shading==2

MIN: add description/url to wradlib BackendEntrypoints

FIX: cfradial2 coordinates

FIX: cfradial2 BackendEntrypoint