Added pdf analyzer

Analyzer should be moved to ActiveStorage::Analyzer
First there are many bugs with ActiveStorage that needs to be fixed:
Files are not deleted if job is destroyed (dependent: :purge is set)
If a new file is uploaded the old file is not deleted
(has_one_attechment)

Gemfile.lock

@@ -1,6 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    Ascii85 (1.1.1)
     actioncable (7.1.3.4)
       actionpack (= 7.1.3.4)
       activesupport (= 7.1.3.4)
@@ -77,6 +78,7 @@ GEM
       tzinfo (~> 2.0)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
+    afm (0.2.2)
     base64 (0.2.0)
     bigdecimal (3.1.8)
     bindex (0.8.1)
@@ -105,6 +107,7 @@ GEM
       i18n (>= 1.8.11, < 2)
     globalid (1.2.1)
       activesupport (>= 6.1)
+    hashery (2.1.2)
     i18n (1.14.5)
       concurrent-ruby (~> 1.0)
     importmap-rails (2.0.1)
@@ -158,6 +161,12 @@ GEM
       racc (~> 1.4)
     nokogiri (1.16.7-x86_64-linux)
       racc (~> 1.4)
+    pdf-reader (2.12.0)
+      Ascii85 (~> 1.0)
+      afm (~> 0.2.1)
+      hashery (~> 2.0)
+      ruby-rc4
+      ttfunk
     psych (5.1.2)
       stringio
     public_suffix (6.0.1)
@@ -213,6 +222,7 @@ GEM
       io-console (~> 0.5)
     rexml (3.3.4)
       strscan
+    ruby-rc4 (0.1.5)
     rubyzip (2.3.2)
     selenium-webdriver (4.23.0)
       base64 (~> 0.2)
@@ -251,6 +261,8 @@ GEM
       railties (>= 7.0.0)
     thor (1.3.1)
     timeout (0.4.1)
+    ttfunk (1.8.0)
+      bigdecimal (~> 3.1)
     turbo-rails (2.0.6)
       actionpack (>= 6.0.0)
       activejob (>= 6.0.0)
@@ -287,6 +299,7 @@ DEPENDENCIES
   importmap-rails
   inline_svg (~> 1.9)
   jbuilder
+  pdf-reader (~> 2.12)
   puma (>= 5.0)
   rails (~> 7.1.3, >= 7.1.3.4)
   redis (>= 4.0.1)