fix(profiles): Switch Pro improvements

[ReenigneArcher]

Description

Route Linux Switch Pro controllers through descriptor-driven UHID, share the native handshake/reply protocol with Windows, and pack live IMU samples into Switch input reports. The API, control UI, tests, and docs now expose Switch Pro player LED output support and document the updated Linux backend behavior.

Screenshot

Issues Fixed or Closed

• Fixes Linux: expose Switch Pro motion through UHID #112
• Closes Steam and Chromium rumble gaps for PlayStation and Switch Pro virtual gamepads #80
• Refs Support Nintendo Switch Pro Player LED output #113
• Refs Windows: Switch Pro gyro is exposed but reports static values #111

Roadmap Issues

Type of Change

• feat: New feature (non-breaking change which adds functionality)
• fix: Bug fix (non-breaking change which fixes an issue)
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semicolons, etc.)
• refactor: Code change that neither fixes a bug nor adds a feature
• perf: Code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies
• ci: Changes to CI configuration files and scripts
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit
• BREAKING CHANGE: Introduces a breaking change (can be combined with any type above)

Checklist

• Code follows the style guidelines of this project
• Code has been self-reviewed
• Code has been commented, particularly in hard-to-understand areas
• Code docstring/documentation-blocks for new or existing methods/components have been added or updated
• Unit tests have been added or updated for any new or modified functionality

AI Usage

See our AI usage policy.

• None: No AI tools were used in creating this PR
• Light: AI provided minor assistance (formatting, simple suggestions)
• Moderate: AI helped with code generation or debugging specific parts
• Heavy: AI generated most or all of the code changes

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
221	1	220	0

View the top 1 failed test(s) by shortest run time

LinuxBackendTest::SocketpairBackedSwitchProUsesNativeUhidProtocol

Stack Traces | 0.12s run time

.../tests/unit/test_linux_backend.cpp:793
Value of: result.switch_pro.saw_subcommand_reply
  Actual: false
Expected: true

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[sonarqubecloud]

Quality Gate failed

Failed conditions
1 New issue
1 New Code Smells (required ≤ 0)

See analysis details on SonarQube Cloud

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