[FEATURE] Proposal: SVG Label generator from Stock Entry - Repack for ERPNext

[Tropicalrambler]

Out of our real life experience in the field, we have been using Stock Entry Repacks successfully and consistently to reflect production of items which we make available for our customers. We are not using Bill of Materials / Work Order / Production functionality yet, due to small scale of our business and lack of staffing to process the entire production workflow. Our staff has found it much more straightforward and understandable to work with the Stock Entry Repacks. Once a Repack has been configured properly, staff are simply duplicating it and changing the date and title to reflect today's production.

Our two-step process to transform a purchased item into available sales items involves two requirements:
Purchase Receipt - Stock Entry Repack

One key element used as an input in the Repack is the label for the output sales item.

The proposal is the following:

1. Configure an item to represent the label. (Width / Height + Check mark is label + SVG code format + Jinja style variable configuration for fields)
2. Include the Item in the repack with the qty required for the transformation / production process.
3. An existing or new tool can fetch all stock entries of type repack containing the items configured as labels for specific date ranges, or make the repacks individually selectable in a child table.
4. Tool generates the same size labels per each PDF printable format, one page representing one individual label of same type. (width x height)
5. User prints the PDF in one go, repeating the print in case of printer failures.
6. Future support for automated printing from the Tool, selecting the specific printer to be used. (in case of multiple printers with multiple labels)