cleanup: remove unused variables and functions across codebase

feat: introduce Council Discussion stage in DPR AI Simulator, enabling multi-member deliberation with consensus building. Update README to reflect new features and enhance simulation logic to include council discussions, along with necessary adjustments in agent and response models.

refactor: rename DPR Simulator to DPR AI Simulator across the codebase and update related documentation

feat: add faction and commission data modules for DPR Simulator, including aspiration examples and mapping of political factions to their ideologies. Enhance member factory and simulation logic to incorporate commission filtering and relevant data handling for improved aspiration processing.

implement data models for DPR Simulator, including DPRMember, Aspirasi, and response structures for various pipeline stages.