Introduced an Actions interface for plugins in 'action.go' and implemented a corresponding registry in 'registry.go'. Additionally, adjusted rule related behavior in 'Server' to account for actions, with relevant new fields in Ruleset and Rule. This enables multiple actions on a log message based on defined rules and further modularises the codebase, paving the path for addition of more plugin actions.
Redid signal handling in the main server code leading to simpler, more readable code. Removed the SPDX license identifiers from 'go.sum' following recent policy changes.
All source code files as well as README.md, .gitignore, and various configuration files have been updated with an SPDX license identifier, changing license from CC0-1.0 to MIT. The copyright year has been updated to 2023, and the copyright holder's email address has been corrected from 'winni@neessen.dev' to 'wn@neessen.dev'. An MIT license text file has been additionally added.
This commit introduces the creation of the core server and its components: config loading mechanism, listener setup, and error handling. The provided configuration allows the server to run different types of listeners. Additionally, it includes robust log-level settings to facilitate debugging and operational transparency.
