feat(analyzer): enhance analyzer cli and logging (#1507)

Some initial work on modernizing the analyzer app. This replace any custom logger or `logging` based logger with the logging tools from `libretime_shared.logging` and `loguru`.

- rename cli to main
- use pathlib in setup.py
- add api-client and shared package as dev deps
- rework main entrypoint cli to use click and shared helpers
- remove unused imports
- replace logging with logger
- rework analyzer app using shared abstract app
- move analyzer log path to systemd service
- change analyzer working dir

BREAKING CHANGE: The analyzer cli has been reworked and uses new flags / environnement variables for configuration.
`--debug` flag becomes `--log-level <level>`
`--rmq-config-file` flag becomes `--config <filepath>`
`--http-retry-queue-file` flag becomes `--retry-queue-filepath`.
`retry-queue-filepath` default value changed from `/tmp/airtime_analyzer_http_retries` to `retry_queue` in the working dir.
`LIBRETIME_CONF_DIR` environnement variable replaced by `LIBRETIME_CONFIG_FILEPATH`.

BREAKING CHANGE: When running analyzer as a systemd service, the working directory is now /var/lib/libretime/analyzer.

install

@@ -1015,6 +1015,8 @@ loud "\n-----------------------------------------------------"
 loud "          * Installing Airtime Services *            "
 loud "-----------------------------------------------------"
 
+LIBRETIME_WORKING_DIR="/var/lib/libretime"
+
 python_version=$($python_bin --version 2>&1 | awk '{ print $2 }')
 verbose "Detected Python version: $python_version"
 pip_cmd="$python_bin -m pip"
@@ -1074,6 +1076,8 @@ verbose "...Done"
 
 verbose "\n * Installing libretime-analyzer..."
 loudCmd "$pip_cmd install ${AIRTIMEROOT}/analyzer"
+loudCmd "mkdir -p ${LIBRETIME_WORKING_DIR}/analyzer"
+loudCmd "chown -R ${web_user}:${web_user} ${LIBRETIME_WORKING_DIR}/analyzer"
 systemInitInstall libretime-analyzer "$web_user"
 verbose "...Done"