[IMP] mrp_bom_overview: clean forecast view with consolidated status

[times-odoo]

The BOM overview forecast view is simplified by removing visual redundancy and consolidating availability information into the Status column.

Changes introduced via patch on BomOverviewLine and inheritance of report.mrp.report_bom_structure:

• Remove the standalone BOM name header section as it duplicates the breadcrumb information already visible in the page header
• Remove the Availability column to reduce redundancy and consolidate all stock information into the Status column
• Display quantity as integer to avoid unnecessary decimal places on whole-number quantities
• Ensure 'Ready To Produce' tag is only shown when producible quantity is greater than zero
• Always render 'Ready To Produce' tag in green for visual consistency regardless of other conditions
• Each component now independently displays its availability state as a colored tag: green for available, dark for estimated, orange for expected, and red for not available
• When components are missing, top-level BOM line shows estimated production date instead of 'No Ready To Produce'
• All status tags are clickable and navigate to the respective product forecast report

task-6204743

[robodoo]