Fix initial load of config/state/secrets

[yasunariw]

Description of the task

Some code got lost after rebasing, which broke the entrypoints of workflows that could only be manually tested. Fixes:

• Initialize secrets in auxiliary command check_gh
• Only print config after initialization
• Handle case where state file path --state is provided but actual file doesn't yet exist
• Correctly build commit url path from template string

How to test

Compile main executable and run the commands with different flags.

• _build/default/src/notabot.exe check_gh mock_payloads/status.success_test_main_branch.json --state state.json
• _build/default/src/notabot.exe run -a 0.0.0.0 -p 8080 --state state.json

References

• due to Modularize dependencies for GH payload consumption and Slack message sending #92 Upgrade status rules syntax and differentiate status state tracking b/w pipelines #93