feat: adds the rest of the polymarket endpoints

[bougyman]

• feat: adds Orderbook endpoint
• refactor: added Listable module to dry up the #list methods
• feat: adds the rest of the polymarket endpoints

[Copilot]

Pull request overview

This PR adds comprehensive support for additional Polymarket API endpoints by introducing new endpoint classes and refactoring existing ones to use a shared Listable module, eliminating code duplication.

Key changes:

• Introduced Listable module to DRY up the #list methods across all Polymarket endpoints
• Added 5 new endpoint classes: Orderbook, Activity, MarketPrice, Wallet, and WalletProfitAndLoss
• Refactored existing endpoints (Markets, Candlesticks, TradeHistory) to use the Listable module

Reviewed changes

Copilot reviewed 23 out of 24 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
lib/domeapi/polymarket/listable.rb	New shared module that provides common list method implementation for all endpoints
lib/domeapi/polymarket/orderbook.rb	New endpoint for fetching orderbook history with filtering support
lib/domeapi/polymarket/activity.rb	New endpoint for fetching user activity data
lib/domeapi/polymarket/market_price.rb	New endpoint for fetching current or historical market prices
lib/domeapi/polymarket/wallet.rb	New endpoint for wallet data with eoa/proxy validation
lib/domeapi/polymarket/wallet_profit_and_loss.rb	New endpoint for wallet profit and loss data with granularity support
lib/domeapi/polymarket/client.rb	Added accessor methods for all new endpoints
lib/domeapi/polymarket/markets.rb	Refactored to use Listable module, removing duplicate list method
lib/domeapi/polymarket/candlesticks.rb	Refactored to use Listable module, removing duplicate list method
lib/domeapi/polymarket/trade_history.rb	Refactored to use Listable module, removing duplicate list method
lib/domeapi/polymarket.rb	Added require statements for all new endpoint classes
lib/domeapi/client.rb	Changed polymarket client initialization from self to clone to prevent prefix modification side effects
test/domeapi/polymarket/*_test.rb	Comprehensive test coverage for all new endpoints with validation testing
test/helper.rb	Added minitest/spec and shoulda/context dependencies
Gemfile	Added shoulda-context and simplecov gems
Readme.adoc	Added documentation example for Orderbook endpoint usage

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