[IMP] figures: add anchor to figures

[fdamhaut]

Description:

[IMP] figures: add anchor to figures

Add possibilities for chart to be anchored to the
top-left corner cell. If a cell is anchored, it
will be moving with the cell on modification of the sheet
(i.e. col/row addition/deletion).

The figure can still have a fixed position, this will act
as if the anchor is placed in the left-most, top-most cell.

Task: 4189170

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]