docs: remove unmaintained entries and add awscli

Remove entries that are unmaintained, low-quality, or superseded:
werkzeug (WSGI server section), feincms, ultrajson, schema, voluptuous,
bpython, splinter, s3cmd, kafka-python, streamparse, zerorpc,
bashplotlib, quads, dejavu, kapre, pyAudioAnalysis, harfang3d,
configobj.

Add awscli to Cloud Providers as a widely-used modern alternative.

Co-Authored-By: Claude <[email protected]>