docs: add 7 medium-priority undocumented SHAFT_ENGINE features

[Copilot]

Closes coverage gaps identified in the documentation gap analysis (issue #440). Adds full documentation for 7 commonly-needed SHAFT features that had no dedicated docs.

New pages

• Keywords/GUI/Async_Element_Actions — driver.async().element() parallel actions via Java 21 virtual threads; covers synchronize() / join() / sync() blocking semantics and when-to-use guidance
• Keywords/GUI/didYouKnow/Mobile_Emulation — Chrome DevTools device emulation; preset device names, custom viewport/UA/DPR, properties file + CLI config

Extended existing pages

• TestData_Management — YAML test data section: type-safe getters (getString, getInteger, getAs, getListAs), nested dot-notation keys, format comparison table updated with YAML column
• API/Request_Builder — GraphQL section: plain query, variables, auth header, mutation; note on auto-wrapping payload
• GUI/Element_Identification — Three new locator sections:
  • XPath Axis Navigation — byAxis().followingSibling(), .ancestor(), .child(), etc. (all 8 axes)
  • ARIA Role-Based Locators — Locator.hasRole(Role.BUTTON), full Role enum reference
  • Smart Locators — Locator.inputField("Email") / Locator.clickableField("Submit")
• didYouKnow/Native_selenium_Webdriver — Upgraded from a stub; adds Wrap Existing WebDriver pattern for incremental Selenium → SHAFT migration:

WebDriver rawDriver = new ChromeDriver();
rawDriver.get("https://example.com");

// Wrap to get SHAFT fluent API, smart waits, and Allure reporting
SHAFT.GUI.WebDriver driver = new SHAFT.GUI.WebDriver(rawDriver);
driver.assertThat().browser().title().contains("Example").perform();

Sidebar

sidebars.js updated to include Async_Element_Actions and Mobile_Emulation.

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