[REF] all: pass pre-commit on the whole repo

Needed for the lint job of the CI to go green. Mostly automatic hook
fixes (black, isort, prettier, pyupgrade, autoflake, whitespace). By hand:

- flake8: two unused imports, an ambiguous variable name `l`.
- pylint-odoo mandatory: manifest keys equal to their default value
  (installable, application, data, external_dependencies).
- end-of-file-fixer skips *.patch too, like trailing-whitespace: the
  upstream patches stay as git format-patch wrote them.

No behaviour change.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

website_membership_signup_required/models/website.py

@@ -1,6 +1,7 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from odoo import fields, models
+from odoo import fields
+from odoo import models
 
 
 class Website(models.Model):
@@ -9,8 +10,8 @@ class Website(models.Model):
     membership_signup_required = fields.Boolean(
         string="Force signup for membership products",
         help="When enabled, anonymous users trying to add a membership product "
-             "to cart are redirected to /web/signup before the product is "
-             "added. Only affects the e-commerce flow.",
+        "to cart are redirected to /web/signup before the product is "
+        "added. Only affects the e-commerce flow.",
         default=True,
     )
 
@@ -30,4 +31,4 @@ class Website(models.Model):
         if not product_id:
             return False
         product = self.env["product.product"].sudo().browse(int(product_id)).exists()
-        return bool(product and product.product_tmpl_id.membership)
+        return bool(product and product.product_tmpl_id.membership)