gems: replace pry with debug.

Replace the 'pry' gem with the 'debug' gem. The debug gem is the new
standard debugger in Ruby 3.1.

Use `binding.break` instead of `binding.pry` to set breakpoints.

Install the extension below for VS Code support.

https://github.com/ruby/debug#how-to-use
https://marketplace.visualstudio.com/items?itemName=KoichiSasada.vscode-rdbg

Gemfile.lock

@@ -117,7 +117,6 @@ GEM
     bootsnap (1.11.1)
       msgpack (~> 1.2)
     builder (3.2.4)
-    byebug (11.1.3)
     capybara (3.36.0)
       addressable
       matrix
@@ -139,6 +138,9 @@ GEM
     daemons (1.4.1)
     dante (0.2.0)
     dead_end (3.1.1)
+    debug (1.4.0)
+      irb (>= 1.3.6)
+      reline (>= 0.2.7)
     debug_inspector (1.1.0)
     declarative (0.0.20)
     derailed_benchmarks (2.1.1)
@@ -254,7 +256,10 @@ GEM
     httpclient (2.8.3)
     i18n (1.10.0)
       concurrent-ruby (~> 1.0)
+    io-console (0.5.11)
     ipaddress_2 (0.14.0)
+    irb (1.4.1)
+      reline (>= 0.3.0)
     jaro_winkler (1.5.4)
     jmespath (1.6.1)
     json (2.6.1)
@@ -327,14 +332,6 @@ GEM
       ast (~> 2.4.1)
     pg (1.3.5)
     prometheus-client (4.0.0)
-    pry (0.13.1)
-      coderay (~> 1.1)
-      method_source (~> 1.0)
-    pry-byebug (3.9.0)
-      byebug (~> 11.0)
-      pry (~> 0.13.0)
-    pry-rails (0.3.9)
-      pry (>= 0.10.4)
     public_suffix (4.0.7)
     puma (5.6.4)
       nio4r (~> 2.0)
@@ -396,6 +393,8 @@ GEM
       json
     redis (4.6.0)
     regexp_parser (2.3.0)
+    reline (0.3.0)
+      io-console (~> 0.5)
     representable (3.1.1)
       declarative (< 0.1.0)
       trailblazer-option (>= 0.1.1, < 0.2.0)
@@ -531,6 +530,7 @@ DEPENDENCIES
   codecov
   crass
   daemons
+  debug
   derailed_benchmarks
   diff-lcs
   dotenv-rails
@@ -560,8 +560,6 @@ DEPENDENCIES
   oauth2
   parallel
   pg
-  pry-byebug
-  pry-rails
   public_suffix
   puma
   puma-metrics