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.

analyzer/libretime_analyzer/cuepoint_analyzer.py

@@ -1,8 +1,8 @@
 import datetime
 import json
-import logging
 import subprocess
-import traceback
+
+from loguru import logger
 
 from .analyzer import Analyzer
 
@@ -87,13 +87,13 @@ class CuePointAnalyzer(Analyzer):
             metadata["cueout"] = silan_cueout
 
         except OSError as e:  # silan was not found
-            logging.warning(
+            logger.warning(
                 "Failed to run: %s - %s. %s"
                 % (command[0], e.strerror, "Do you have silan installed?")
             )
         except subprocess.CalledProcessError as e:  # silan returned an error code
-            logging.warning("%s %s %s", e.cmd, e.output, e.returncode)
+            logger.warning("%s %s %s", e.cmd, e.output, e.returncode)
         except Exception as e:
-            logging.warning(e)
+            logger.warning(e)
 
         return metadata