Add status badges to README (#303)

* Add status badges to README

Inserted various status badges for CI, code coverage, documentation,
linting, type checking, license, Python versions, latest release, and
package downloads. These badges provide quick visual indicators of the
project's current state and integrations.

* Update Conda downloads badge link in README.md

Swapped the Conda downloads badge URL to a consistent `shields.io` link
that provided the "conda|downloads" label. This change aligns the
appearance of the Conda badge with the other badges on the page.

README.md

@@ -1,5 +1,19 @@
 # VirtualiZarr
 
+[![CI](https://github.com/zarr-developers/VirtualiZarr/actions/workflows/main.yml/badge.svg?branch=main)](https://github.com/zarr-developers/VirtualiZarr/actions?query=workflow%3ACI)
+[![Code coverage](https://codecov.io/gh/zarr-developers/VirtualiZarr/branch/main/graph/badge.svg?flag=unittests)](https://codecov.io/gh/zarr-developers/VirtualiZarr)
+[![Docs](https://readthedocs.org/projects/virtualizarr/badge/?version=latest)](https://virtualizarr.readthedocs.io/en/latest/)
+[![Linted and Formatted with Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
+[![Checked with mypy](http://www.mypy-lang.org/static/mypy_badge.svg)](http://mypy-lang.org/)
+[![pre-commit Enabled](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://pre-commit.com/)
+[![Apache 2.0 License](https://img.shields.io/badge/license-Apache%202-cb2533.svg)](https://www.apache.org/licenses/LICENSE-2.0)
+[![Python Versions](https://img.shields.io/python/required-version-toml?tomlFilePath=https://raw.githubusercontent.com/zarr-developers/VirtualiZarr/main/pyproject.toml&logo=Python&logoColor=gold&label=Python)](https://docs.python.org)
+
+[![Latest Release](https://img.shields.io/github/v/release/zarr-developers/VirtualiZarr)](https://github.com/zarr-developers/VirtualiZarr/releases)
+[![PyPI - Downloads](https://img.shields.io/pypi/dm/virtualizarr?label=pypi%7Cdownloads)](https://pypistats.org/packages/virtualizarr)
+[![Conda - Downloads](https://img.shields.io/conda/d/conda-forge/virtualizarr
+)](https://anaconda.org/conda-forge/virtualizarr)
+
 **VirtualiZarr creates virtual Zarr stores for cloud-friendly access to archival data, using familiar xarray syntax.**
 
 VirtualiZarr (pronounced like "virtualizer" but more piratey) grew out of [discussions](https://github.com/fsspec/kerchunk/issues/377) on the [kerchunk repository](https://github.com/fsspec/kerchunk), and is an attempt to provide the game-changing power of kerchunk in a zarr-native way, and with a familiar array-like API.