Add Keybase integration (#10297)

* create account_identity_proofs table

* add endpoint for keybase to check local proofs

* add async task to update validity and liveness of proofs from keybase

* first pass keybase proof CRUD

* second pass keybase proof creation

* clean up proof list and add badges

* add avatar url to keybase api

* Always highlight the “Identity Proofs” navigation item when interacting with proofs.

* Update translations.

* Add profile URL.

* Reorder proofs.

* Add proofs to bio.

* Update settings/identity_proofs front-end.

* Use `link_to`.

* Only encode query params if they exist.

URLs without params had a trailing `?`.

* Only show live proofs.

* change valid to active in proof list and update liveness before displaying

* minor fixes

* add keybase config at well-known path

* extremely naive feature flagging off the identity proof UI

* fixes for rubocop

* make identity proofs page resilient to potential keybase issues

* normalize i18n

* tweaks for brakeman

* remove two unused translations

* cleanup and add more localizations

* make keybase_contacts an admin setting

* fix ExternalProofService my_domain

* use Addressable::URI in identity proofs

* use active model serializer for keybase proof config

* more cleanup of keybase proof config

* rename proof is_valid and is_live to proof_valid and proof_live

* cleanup

* assorted tweaks for more robust communication with keybase

* Clean up

* Small fixes

* Display verified identity identically to verified links

* Clean up unused CSS

* Add caching for Keybase avatar URLs

* Remove keybase_contacts setting

config/routes.rb

@@ -22,6 +22,8 @@ Rails.application.routes.draw do
   get '.well-known/host-meta', to: 'well_known/host_meta#show', as: :host_meta, defaults: { format: 'xml' }
   get '.well-known/webfinger', to: 'well_known/webfinger#show', as: :webfinger
   get '.well-known/change-password', to: redirect('/auth/edit')
+  get '.well-known/keybase-proof-config', to: 'well_known/keybase_proof_config#show'
+
   get 'manifest', to: 'manifests#show', defaults: { format: 'json' }
   get 'intent', to: 'intents#show'
   get 'custom.css', to: 'custom_css#show', as: :custom_css
@@ -106,6 +108,8 @@ Rails.application.routes.draw do
       resource :confirmation, only: [:new, :create]
     end
 
+    resources :identity_proofs, only: [:index, :show, :new, :create, :update]
+
     resources :applications, except: [:edit] do
       member do
         post :regenerate
@@ -248,6 +252,9 @@ Rails.application.routes.draw do
     # OEmbed
     get '/oembed', to: 'oembed#show', as: :oembed
 
+    # Identity proofs
+    get :proofs, to: 'proofs#index'
+
     # JSON / REST API
     namespace :v1 do
       resources :statuses, only: [:create, :show, :destroy] do