Configure default Twitter summary card type

[BlythMeister]

Add ability at site level to not use the large twitter summary

Current rather yucky workaround is doing this:

{% capture seo %}
{% seo %}
{% endcapture %}

{{ seo | replace: "summary_large_image", "summary" }}

fix #84

[carlows]

Would be great to have this!

[mattr-]

LGTM

[mattr-]

Any other objections @pathawks @DirtyF or @benbalter ?

[DirtyF]

No objection, except about the naming, don't forget to add documentation if this is accepted.

[DirtyF]

What about just naming this twitter.summary?

[benbalter]

Alternatively, perhaps something like <meta name="twitter:card" content="{{ site.twitter.card | default: "summary_large_image" }}" /> may be more intuitive to end users?

[BlythMeister]

I like that idea!
Is there a way to do a double default.
E.g.
Page.twitter.card
Then
Site.twitter.card
Then
Summary large image

[benbalter]

Yep! You can chain defaults, e.g., | default: page.twitter.card | default: site.twitter.card...

[BlythMeister]

Sweet, leave this with me...I like that 👍

[BlythMeister]

Updates made, also given option for a site level image.
On my site i had to add the same image to every post/page
Post/Page takes priority as does the card size

[BlythMeister]

Disclaimer: I'm not sure how to test these changes locally, so it is in untested.

I did also update the docs as part of this pr

[BlythMeister]

I have just realised this is now over complex and could be done using defaults.
Please disregard these changes I will raise a clean fresh or and link to this one.