Alias ruby gem loadable_path to to_path

The sqlite3-ruby recently published an improvement to make it easier and
more flexible to load extensions:

sparklemotion/sqlite3-ruby#586

Ruby modules for SQLite extensions should implement the interface:

    interface _ExtensionSpecifier
      def to_path: () → String
    end

A complementary change in Rails takes advantage of this interface to
integrate the primary configuration file with the new sqlite3-ruby
interface for extension loading:

rails/rails#53827

The gem template provided here already has a similar method:

    def loadable_path

The change proposed here is to modify the gem template to provide an
alias to loadable_path as to_path.o

    # example
    SqliteVec.to_path # => returns same result as loadable_path

As a result of this change, Ruby gems published with this tool will
conform to the new interface supported in sqlite3-ruby and Rails.

Author: rossta

src/gem.rs

@@ -297,9 +297,14 @@ module {module_name}
   def self.loadable_path
     File.expand_path('{entrypoint}', File.dirname(__FILE__))
   end
+
   def self.load(db)
     db.load_extension(self.loadable_path)
   end
+
+  class << self
+    alias_method :to_path, :loadable_path
+  end
 end
 
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