doc: converted readme to adoc and added basic documentations

Author: bougyman

README.md

@@ -104,4 +104,4 @@ To install this gem onto your local machine, run `bundle exec rake install`. To
 
 == Contributing
 
-Bug reports and pull requests are welcome on GitHub at https://github.com/bougyman/domeapi.
+Bug reports and pull requests are welcome on GitHub at https://github.com/rubyists/domeapi.

Readme.adoc

@@ -9,12 +9,12 @@ Gem::Specification.new do |spec|
   spec.email = ['bougyman@users.noreply.github.com']
 
   spec.summary = 'Ruby SDK for domeapi.io (unofficial).'
-  spec.homepage = 'https://github.com/bougyman/domeapi'
+  spec.homepage = 'https://github.com/rubyists/domeapi'
   spec.required_ruby_version = '>= 4.0'
 
   spec.metadata['allowed_push_host'] = 'https://rubygems.org'
   spec.metadata['homepage_uri'] = spec.homepage
-  spec.metadata['source_code_uri'] = 'https://github.com/bougyman/domeapi'
+  spec.metadata['source_code_uri'] = 'https://github.com/rubyists/domeapi'
   spec.metadata['rubygems_mfa_required'] = 'true'
 
   # Specify which files should be added to the gem when it is released.

domeapi.gemspec

@@ -9,6 +9,8 @@ module Domeapi
     class Contract < Reform::Form
       feature Reform::Form::Dry
 
+      def self.custom_definitions = instance_variable_get(:@definitions)&.keys&.map(&:to_sym) || []
+
       def to_h
         to_nested_hash.compact
       end

lib/domeapi/contract.rb

@@ -6,6 +6,7 @@ module Polymarket
       # Filter for Polymarket markets
       class MarketFilter < Contract
         Properties = Struct.new(
+          *custom_definitions,
           :market_slug,
           :event_slug,
           :condition_id,
@@ -19,7 +20,10 @@ class MarketFilter < Contract
           keyword_init: true
         )
 
-        Properties.members.each { |member| property member, populator: ->(model:, **) { model || skip! } }
+        # Define properties with custom populator to skip optional params with nil values
+        (Properties.members - custom_definitions).each do |member|
+          property member, populator: ->(value:, **) { value || skip! }
+        end
 
         validation do
           params do