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/setup.py

@@ -1,9 +1,11 @@
-import os
+from os import chdir
+from pathlib import Path
 
 from setuptools import setup
 
 # Change directory since setuptools uses relative paths
-os.chdir(os.path.dirname(os.path.realpath(__file__)))
+here = Path(__file__).parent
+chdir(here)
 
 setup(
     name="libretime-analyzer",
@@ -20,7 +22,7 @@ setup(
     packages=["libretime_analyzer"],
     entry_points={
         "console_scripts": [
-            "libretime-analyzer=libretime_analyzer.cli:main",
+            "libretime-analyzer=libretime_analyzer.main:cli",
         ]
     },
     python_requires=">=3.6",
@@ -37,6 +39,8 @@ setup(
     extras_require={
         "dev": [
             "distro",
+            f"libretime-api-client @ file://localhost/{here.parent / 'api_client'}#egg=libretime_api_client",
+            f"libretime-shared @ file://localhost/{here.parent / 'shared'}#egg=libretime_shared",
         ],
     },
     zip_safe=False,