format and fix minor issues due to the transition nodes

add the prepare_code_repair node and update graph

add transition node for context preparation between planner and coder

improve description of some TesterSummary fields and fix other minor details

add tool tester_run_project_verification and validation to enforce that the verifications occur before moving to the next node

add tester_run_verification_command to tester; update tester summary fields description, and related

add coder's and tester's states to facilitate routing

fix graph

defining routes, improving graph and other work related to tester node

tie up code and start working on the tester node

add submit_coder_summary tool

reestructure code of coder

delimiting scope of coder agent

add coder node structure and update graph

add initial graph structure and planner