Added cashtag support for statuses

• Added:
- cashtag support for statuses

Ref: e23931b255

app/models/tag.rb

@@ -18,7 +18,8 @@ class Tag < ApplicationRecord
   has_one :account_tag_stat, dependent: :destroy
 
   HASHTAG_NAME_RE = '[[:word:]_]*[[:alpha:]_·][[:word:]_]*'
-  HASHTAG_RE = /(?:^|[^\/\)\w])#(#{HASHTAG_NAME_RE})/i
+  HASHTAG_RE = /(?:^|[^\/\)\w])#(#{HASHTAG_NAME_RE})/i.freeze
+  CASHTAG_RE = /(?:^|[^\/\)\w])\$([a-zA-Z]{2,5})/.freeze
 
   validates :name, presence: true, uniqueness: true, format: { with: /\A#{HASHTAG_NAME_RE}\z/i }