feat: Context-Aware Input Policy Pipeline with Decoupled UI Command Dispatch

[mverch67]

• input handling is now policy-driven and context-aware, so the same keys can adapt to focused UI state instead of hard-coded per-driver behavior

• the new pipeline cleanly separates key source, key-to-action mapping, policy evaluation, and UI command dispatch, which reduces coupling and makes behavior easier to extend

• it also adds support for dedicated command keys and structured event decisions (pass, remap, consume, emit command/sequence) for predictable, testable input behavior

E.g. a keyboard with cursor keys can now use the cursor keys to navigate the map (context-aware) or move inside text input areas. ESC key to leave this mode.

Note:
As a usage example the new classes are used within the KeyMatrixInputDriver (PICOmputer). See also here.

Summary by CodeRabbit

• New Features
  • Added a documented, policy-driven input pipeline with focus-aware remapping and UI command dispatch.
  • Introduced a WebDAV server with WiFi/MDNS start-stop, running/status reporting, and transfer progress tracking.
  • Expanded I2C keyboard support with new TM9 and STC8H drivers and pipeline-based matrix event handling.
• Bug Fixes
  • Improved LVGL touch responsiveness with a configurable read timer (default 20ms) and safer timer setup.
  • Enhanced widget overlay/input grouping behavior and added WebDAV UI status update support.
  • Improved LVGL styling consistency (selector casting) and keyboard device probing reliability.
• Tests
  • Added automated tests covering input policy and UI command dispatch behavior.