feature: add default page override option for resource

[joshprice]

Currently this option can be set to one of the following:

• :schema
• :read
• :create
• :update
• :destroy
• {:action, action_name}

Will implement the ability to specify a custom page later with:

• {:custom, custom_page_name}

[zachdaniel]

need to run mix ash.formatter, additionally, we should change the default_resource_action in the api page to be :read instead of :primary_read, likely :)

[zachdaniel]

Otherwise looks great!

[coveralls]

Pull Request Test Coverage Report for Build 44eea96e012620ec5edccc81b947d304f2fb8216-PR-20

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 0.0%

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Totals
Change from base Build 1834251ca7e1fee5a2b87c0810c951b4e6d666fa:	0.0%
Covered Lines:	0
Relevant Lines:	0

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💛 - Coveralls

[zachdaniel]

This is pretty out of date, closing for now.