feat: Add servicex client

* c.f. https://github.com/ssl-hep/ServiceX_frontend
* Recipe generated with grayskull via 'grayskull pypi servicex'
  and then edited to add additional information.

recipes/servicex/meta.yaml

@@ -0,0 +1,68 @@
+{% set name = "servicex" %}
+{% set version = "3.0.0" %}
+
+package:
+  name: {{ name|lower }}
+  version: {{ version }}
+
+source:
+  url: https://pypi.org/packages/source/{{ name[0] }}/{{ name }}/servicex-{{ version }}.tar.gz
+  sha256: 10fe7aa45ade9ba978563e20cf51f80aa149139423fd0b0766cd7e72e06e1f74
+
+build:
+  skip: true  # [py<38]
+  entry_points:
+    - servicex = servicex.app.main:app
+  script: {{ PYTHON }} -m pip install . -vv --no-deps --no-build-isolation
+  number: 0
+
+requirements:
+  host:
+    - python
+    - hatchling >=1.13.0
+    - pip
+  run:
+    - python
+    - qastle >=0.17
+    - func-adl >=3.2.6
+    - requests >=2.31
+    - pydantic >=2.6.0
+    - aiohttp-retry >=2.8.3
+    - httpx >=0.24
+    - miniopy-async >=1.20.1
+    - tinydb >=4.7
+    - google-auth >=2.17
+    - typer >=0.12.1
+    - pyyaml >=6.0
+    - types-pyyaml >=6.0
+    - importlib-metadata  # [py<=39]
+    - typing_extensions  # [py<=310]
+    - rich >=13.0.0
+    - aiofile
+    - make-it-sync
+    - ruamel.yaml >=0.18
+    - ccorp-yaml-include-relative-path >=0.0.4
+    - filelock >=3.12.0
+    - tenacity >=9.0.0
+
+test:
+  imports:
+    - servicex
+  commands:
+    - pip check
+    - servicex --help
+  requires:
+    - pip
+
+about:
+  home: https://github.com/ssl-hep/ServiceX_frontend
+  summary: Python SDK and CLI Client for ServiceX
+  license: BSD-3-Clause
+  license_file: LICENSE
+  doc_url: https://servicex-frontend.readthedocs.io/
+  dev_url: https://github.com/ssl-hep/ServiceX_frontend
+
+
+extra:
+  recipe-maintainers:
+    - matthewfeickert