[Improvement] Remove reflection stuff

[felipebaltazar]

Description

We should remove reflection from BaseFeature using source generators to build the default values.
This change will set FeatureFlag.Management.Firebase as required dependency.. so we need to change this package name to FeatureFlag.Management.Analyzer

Tasks

• Remove BaseFeature processing for default value
• Update BaseFeature to be partial class
• Update generator to build default values as constants
• Fix workflows