Add personalization for Hyperlog portfolio

[nikochiko]

Changes

Tagline

• Add tagline field in user table
• Add mutation to set tagline (setTagline)
• Allow tagline to be queried on UserType

Social links

• Add social_links field on user table.
• Allow querying social_links as JSON String from UserType { socialLinks }
• Add mutation setSocialLinks($provider: $handle) { success: Boolean! } to modify social links. (Using $provider: "" will remove that provider from social links).

About page

• Add about_page queryable field on User
• Add setAboutPage(new: String!){ success: Boolean! } mutation to set the content of about page

Theme codes

• Add theme_code field on User.
• Add setThemeCode(new: String!) { success: Boolean! } mutation to set the theme code.

Under Construction

• Add under_construction field on User
• Add markPortfolioAsConstructed mutation to set it to False

Setup Step field

• Add setup_step field on user
• Add mutations to increase and decrease step, and to complete setup

[nikochiko]

I'll add the remaining user customization tasks in this same PR.