[18.0][ADD] repair_analytic_timesheet: add new module

[kaynnan]

cc @marcelsavegnago @WesleyOliveira98 @CristianoMafraJunior @douglascstd

This module extends Repair Analytic (repair_analytic) to include timesheet (labor) costs in the analytic distribution when a repair order is completed.

• Adds a Spread Timesheet Cost on Repair boolean field to project.project (Settings tab), allowing each project to opt-in to this behavior.
• On repair completion, for each timesheet linked to the repair order whose project has spread_timesheet_cost_on_repair = True, creates account.analytic.line entries distributed proportionally across all analytic accounts configured in the repair order's Analytic Distribution.
• The amount per analytic account is calculated as timesheet.amount × percentage / 100, preserving the sign (negative = labor cost).
• On cancel or deletion of the repair order, removes all generated analytic distribution lines while preserving the original timesheet entries.
• Overrides _compute_analytic_line_count to count only distribution lines (those without project_id), keeping timesheet entries out of the smart button counter.

Depends on: repair_analytic (#174), repair_timesheet