Bug: Templates do not work with images

[EmperorArthur]

When attempting to use templates to arrange QR codes, I found that it produces an error.

The error may occur in the render call, but the issue is with the assignment. The fact the data is stored in pdf.texts gives a hint to the problem, which is Template.__setitem__ always calls str(value).

Example Code:

import qrcode
from fpdf import Template
barcode_page_elements = [
            {
                "name": "barcode_0",
                "type": "I",
                "x1": 50,
                "y1": 50,
                "x2": 100,
                "y2": 100,
                "priority": 0,
                "text": None,
            },
            {
                "name": "barcode_1",
                "type": "I",
                "x1": 150,
                "y1": 150,
                "x2": 200,
                "y2": 200,
                "priority": 0,
                "text": None,
            }
]
pdf = Template(format="letter", elements=barcode_page_elements)
pdf.add_page()
pdf["barcode_0"] = qrcode.make("Test 0").get_image()
pdf["barcode_1"] = qrcode.make("Test 1").get_image()
pdf.render("out.txt")

[EmperorArthur]

Note: Given how multi-page works with templates, I would suggest considering marking __setitem__ as deprecated, and adjusting the instructions/examples to directly set the appropriate page within pdf.texts.

[Lucas-C]

I have just submitted #177 to solve this issue

Could you please have a look at it @EmperorArthur?