Upgrade to Rails 8.0.3

[baonguyenNava]

Major version upgrade:

release notes - See for full list of deprecations.

Then main deprecations we may need to address are in the views. Otherwise, most of the deprecations are configs.

[6.1. Removals](https://guides.rubyonrails.org/8_0_release_notes.html#action-view-removals)
Remove deprecated support to passing nil to the model: argument of form_with.

Remove deprecated support to passing a content to void tag elements on the tag builder.

Resoles #71

New framework defaults and configs below

# Be sure to restart your server when you modify this file.
#
# This file eases your Rails 8.0 framework defaults upgrade.
#
# Uncomment each configuration one by one to switch to the new default.
# Once your application is ready to run with all new defaults, you can remove
# this file and set the `config.load_defaults` to `8.0`.
#
# Read the Guide for Upgrading Ruby on Rails for more info on each option.
# https://guides.rubyonrails.org/upgrading_ruby_on_rails.html

###
# Specifies whether `to_time` methods preserve the UTC offset of their receivers or preserves the timezone.
# If set to `:zone`, `to_time` methods will use the timezone of their receivers.
# If set to `:offset`, `to_time` methods will use the UTC offset.
# If `false`, `to_time` methods will convert to the local system UTC offset instead.
#++
# Rails.application.config.active_support.to_time_preserves_timezone = :zone

###
# When both `If-Modified-Since` and `If-None-Match` are provided by the client
# only consider `If-None-Match` as specified by RFC 7232 Section 6.
# If set to `false` both conditions need to be satisfied.
#++
# Rails.application.config.action_dispatch.strict_freshness = true

###
# Set `Regexp.timeout` to `1`s by default to improve security over Regexp Denial-of-Service attacks.
#++
# Regexp.timeout = 1

[baonguyenNava]

Calling form_with with model: nil is deprecated

[lorenyu]

What if we want to create a form without a model like a search bar?

[baonguyenNava]

I can revise it to remove the argument in model is nil

[doshitan]

I think we should update the default to false to match upstream. And let anywhere currently calling explicitly with model: nil break (fixing any current usage in template-application-rails in this PR of course).

Suggested change

	def us_form_with(model: nil, scope: nil, url: nil, format: nil, **options, &block)
	def us_form_with(model: false, scope: nil, url: nil, format: nil, **options, &block)

Ideally we would specify this as a type, so static checking would catch the callsites, but Ruby....

[doshitan]

Are there any config changes worth calling out?

Did we run rails app:update?

[baonguyenNava]

Yes I did. Nothing big, but I can leave commentary in the PR in case someone wants to change something downstream.

[doshitan]

I think we should update the default to false to match upstream. And let anywhere currently calling explicitly with model: nil break (fixing any current usage in template-application-rails in this PR of course).

Suggested change

	def us_form_with(model: nil, scope: nil, url: nil, format: nil, **options, &block)
	def us_form_with(model: false, scope: nil, url: nil, format: nil, **options, &block)

Ideally we would specify this as a type, so static checking would catch the callsites, but Ruby....

[lorenyu]

@baonguyenNava if you add "Resolves #71" to the Description it'll automatically mark that ticket as done when this PR is merged