Ledger/transaction_logic: extract transaction_partially_applied

module to separate file

Split the large transaction_logic.rs file by extracting the
transaction_partially_applied module (1076 lines) into its own file
at ledger/src/scan_state/transaction_logic/transaction_partially_applied.rs.

Changes:
- Created transaction_partially_applied.rs with
  ZkappCommandPartiallyApplied, TransactionPartiallyApplied, and
  FullyApplied types
- Includes apply_transaction_first_pass/second_pass and
  apply_transactions functions
- Includes apply_coinbase, apply_fee_transfer, apply_user_command and
  related helper functions
- Added module declaration and re-exports in mod.rs for
  apply_transaction_first_pass, apply_transaction_second_pass,
  apply_transactions, apply_user_command, set_with_location, and
  AccountState
- Removed self-import statement and extra closing brace from
  extracted file

Author: dannywillems