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

app/lib/proof_provider/keybase/serializer.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class ProofProvider::Keybase::Serializer < ActiveModel::Serializer
+  include RoutingHelper
+
+  attribute :avatar
+
+  has_many :identity_proofs, key: :signatures
+
+  def avatar
+    full_asset_url(object.avatar_original_url)
+  end
+
+  class AccountIdentityProofSerializer < ActiveModel::Serializer
+    attributes :sig_hash, :kb_username
+
+    def sig_hash
+      object.token
+    end
+
+    def kb_username
+      object.provider_username
+    end
+  end
+end