[IMP] selection_stream_processor: cycle within selection on Tab/Enter

[dhrp-odoo]

Description:

When one or more zones are selected, pressing Tab or Enter moves the anchor within the current selection, rather than extending the selection or replacing it.

In-selection navigation:

• Tab / Shift+Tab: traverse horizontally (right/left), wrap to next row
• Enter / Shift+Enter: traverse vertically (down/up), wrap to next col
• With multiple zones, jump to the next zone entry in navigation order
• Merges are treated as a single target (visited once)

Task: 4647116

review checklist

• feature is organized in plugin, or UI components
• support of duplicate sheet (deep copy)
• in model/core: ranges are Range object, and can be adapted (adaptRanges)
• in model/UI: ranges are strings (to show the user)
• undo-able commands (uses this.history.update)
• multiuser-able commands (has inverse commands and transformations where needed)
• new/updated/removed commands are documented
• exportable in excel
• translations (_t("qmsdf %s", abc))
• unit tested
• clean commented code
• track breaking changes
• doc is rebuild (npm run doc)
• status is correct in Odoo

[robodoo]