Add check for gem-release installation

The release task requires the gem-release gem to be installed globally.
Added a check at the beginning of the task to verify it's installed and
provide clear installation instructions if it's missing.

Also clarified in the task description that gem-release should be
installed globally with `gem install gem-release`.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

lib/tasks/release.rake

@@ -4,7 +4,8 @@ desc("Releases the gem using the given version.
 
 IMPORTANT: the gem version must be in valid rubygem format (no dashes).
 
-This task depends on the gem-release ruby gem which is installed via `bundle install`
+This task depends on the gem-release ruby gem. Install it globally with:
+  gem install gem-release
 
 1st argument: The new version in rubygem format (no dashes). Pass no argument to
               automatically perform a patch version bump.
@@ -21,6 +22,11 @@ task :release, %i[gem_version dry_run] do |_t, args|
     File.expand_path('..', __dir__)
   end
 
+  # Check if gem-release is installed
+  unless system("gem list -i gem-release > /dev/null 2>&1")
+    raise "gem-release is not installed. Please run: gem install gem-release"
+  end
+
   # Check if there are uncommitted changes
   unless `git status --porcelain`.strip.empty?
     raise "You have uncommitted changes. Please commit or stash them before releasing."