add user follow feature

Gemfile.lock

@@ -82,6 +82,8 @@ GEM
     factory_bot_rails (6.2.0)
       factory_bot (~> 6.2.0)
       railties (>= 5.0.0)
+    faker (2.19.0)
+      i18n (>= 1.6, < 2)
     globalid (1.0.0)
       activesupport (>= 5.0)
     i18n (1.10.0)
@@ -174,8 +176,6 @@ GEM
       rspec-mocks (~> 3.10)
       rspec-support (~> 3.10)
     rspec-support (3.11.0)
-    shoulda-matchers (5.1.0)
-      activesupport (>= 5.2.0)
     strscan (3.0.1)
     thor (1.2.1)
     timeout (0.2.0)
@@ -193,12 +193,12 @@ DEPENDENCIES
   bootsnap
   debug
   factory_bot_rails (~> 6.2)
+  faker (~> 2.19)
   jbuilder
   pg (~> 1.1)
   puma (~> 5.0)
   rails (~> 7.0.2, >= 7.0.2.2)
   rspec-rails (~> 5.1)
-  shoulda-matchers (~> 5.1)
 
 RUBY VERSION
    ruby 3.1.1p18