feat: implement XML filter for Pydantic/dictionary/deserializable string

[AstraBert]

As per title, I implemented a to_xml filter that turns Pydantic models, dictionaries and deserializable strings into XML representations.

Here is an example usage (reported also in the docs):

from banks import Prompt
from pydantic import BaseModel
from typing import Dict

prompt_template = """
Please extract the contact details from this user:

{{ data | to_xml }}

Contact details:
"""

class User(BaseModel):
    username: str
    account_id: str
    registered_at: str
    email: str
    phone_number: str
    social_media_accounts: Dict[str, str]

user = User(username="example", account_id="0000", registered_at="10-25-2024", email="[email protected]", phone_number="0123456789", social_media_accounts={"BlueSky": "@example.com"})

p = Prompt(prompt_template)
print(p.text({"data": user}))

This will output:

Please extract the contact details from this user:

<user>
	<username>example</username>
	<account_id>0000</account_id>
	<registered_at>10-25-2024</registered_at>
	<email>[email protected]</email>
	<phone_number>0123456789</phone_number>
	<social_media_accounts>{'BlueSky': '@example.com'}</social_media_accounts>
</user>


Contact details:

[masci]

If you fix the linter we're good to go!

[masci]

Suggested change

	Convert a Pydatic model, a deserializable string or a dictionary into an XML string.
	Convert a Pydantic model, a deserializable string or a dictionary into an XML string.

[AstraBert]

Ok, I broke everything, let me revert it and fix it

[coveralls]

coverage: 94.321% (-0.5%) from 94.792%
when pulling 48cc1bd on AstraBert:clelia/add-pydantic-input-and-xml-filter
into 17c1bc5 on masci:main.

[AstraBert]

I think the test failure is not related to my change(?)

[masci]

🚀