feat(playout): enhance playout logging (#1495)

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

Removed all the thread/function assigned logger (self.logger = ...), as this makes it
part of the logic (passing logger though function args) as it should not.

Of a dedicated logger is required for a specific task, it should use
the create_task_logger function.

- refactor: remove dead code
- refactor: remove py2 specific fix
- feat: remove unused test command
- feat: setup shared cli and logging tools
- feat: replace logging with loguru
- feat: setup shared cli and logging tools for notify
- fix: warn method deos not exist
- feat: make cli setup the entrypoint
- fix: install shared modules globally in production
  use extra_requires to load local packages in dev environement
- feat: configure log path in systemd service
- feat: default behavior is to log to console only
- feat: create log dir during install
- chore: add comment
- fix: don't create useless dir in install
- fix: move notify logs to /var/log/libretime dir
- fix: update setup_logger attrs
- style: linting
- fix: replace verbosity flag with log-level flag
- feat: use shared logging tool in liquidsoap
- fix: pass logger down to api client
- feat: allow custom log_filepath in liquidsoap config
- chore: add pylintrc to playout
- refactor: fix pylint errors
- feat: set liquidsoap log filepath in systemd service
- fix: missing setup entrypoint update

BREAKING CHANGE: for playout and liquidsoap the default log file path changed to None
and will only log to the console when developing / testing. Unless you are running the
app as a systemd service (production) the default logs filepaths changed:
from "/var/log/airtime/pypo/pypo.log" to "/var/log/libretime/playout.log" and
from "/var/log/airtime/pypo-liquidsoap/ls_script.log" to "/var/log/libretime/liquidsoap.log"

BREAKING CHANGE: for playout-notify the default log file path changed
from "/var/log/airtime/pypo/notify.log" to "/var/log/libretime/playout-notify.log"

playout/setup.py

@@ -27,8 +27,8 @@ setup(
     package_data={"": ["**/*.liq", "*.cfg", "*.types"]},
     entry_points={
         "console_scripts": [
-            "libretime-playout=libretime_playout.main:run",
-            "libretime-liquidsoap=libretime_liquidsoap.main:run",
+            "libretime-playout=libretime_playout.main:cli",
+            "libretime-liquidsoap=libretime_liquidsoap.main:cli",
             "libretime-playout-notify=libretime_playout.notify.main:run",
         ]
     },
@@ -43,5 +43,11 @@ setup(
         "pytz",
         "requests",
     ],
+    extras_require={
+        "dev": [
+            f"libretime-shared @ file://localhost/{here.parent / 'shared'}#egg=libretime_shared",
+            f"libretime-api-client @ file://localhost/{here.parent / 'api_client'}#egg=libretime_api_client",
+        ],
+    },
     zip_safe=False,
 )