Implemented new template functions to allow conversion of strings to SHA-1, SHA-256, and SHA-512 hash formats, as well as base64 encoding. These changes include the creation of the SHAAlgo type and associated constants representing different SHA algorithms. The additional functionality will enhance template handling by adding more options for string encryption and encoding.
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.
