Document robot controls and add regression tests

[Kamilr616]

Summary

• document the proportional one-joystick differential-drive algorithm in both READMEs
• add the exact joystick equations, dead zones, keyboard mapping, command timing, and safety behavior to the technical documentation
• add regression coverage for straight motion, proportional arcs, rotation in place, stop behavior, and arrow-key control
• add CLAUDE.md forwarding agent guidance to AGENTS.md

Impact

The repository now explains how a single joystick combines throttle and steering for smooth differential-drive movement, including rotation around the robot's own axis, while also documenting keyboard control as an alternative. Tests protect the documented PWM mappings from regressions.

Validation

• dotnet test src/server/SmartBotBlazorApp.Tests/SmartBotBlazorApp.Tests.csproj --no-restore --nologo — 28 passed
• git diff --check — passed

[Copilot]

Pull request overview

This PR documents how the dashboard converts joystick/keyboard input into differential-drive motor commands, and adds regression tests to keep the documented PWM mappings stable.

Changes:

• Added regression tests for joystick dead zones, proportional mixing, rotation-in-place, and arrow-key mappings.
• Documented the control algorithm and safety/throttling behavior across README(s) and technical docs.
• Added CLAUDE.md to forward agent guidance to AGENTS.md.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/server/SmartBotBlazorApp.Tests/RobotMovementInputTests.cs	Adds regression tests for joystick mixing/dead zones and arrow-key motor mappings.
README.md	Documents one-joystick differential-drive behavior and keyboard alternative.
README.pl.md	Polish version of the new one-joystick differential-drive documentation.
docs/server.md	Adds a server-side control-input overview pointing to the relevant handlers/pages.
docs/getting-started.md	Adds a quick “control reference” section for joystick + arrow keys.
docs/architecture.md	Adds detailed motion-control equations, dead zones, and timing/safety behavior.
CLAUDE.md	Forwards agent instructions to AGENTS.md.

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