feat: add Active as default for MuxRumbleTarget enum

[ruffsl]

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[Copilot]

Pull request overview

This PR adds the Active rumble target as the default for the MuxRumbleTarget enum, enabling dynamic force feedback routing based on currently active controllers in toggle mode. The PR also includes several related improvements to signal handling, file locking, and dependency management.

Changes:

• Introduces MuxRumbleTarget::Active enum variant with active controller tracking for dynamic force feedback routing
• Replaces ctrlc with signal-hook to support both SIGINT and SIGTERM signals
• Adds file locking with fs2 for Steam config file modifications to prevent race conditions
• Updates dependencies (gilrs, ashpd, clap, libc, log, toml)

Reviewed changes

Copilot reviewed 20 out of 21 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
src/mux/mod.rs	Defines new MuxRumbleTarget enum with Active as default
src/mux/runtime.rs	Implements active controller tracking with generation-based FF rebuild system
src/mux/modes/mod.rs	Adds MuxOutput struct and initial_active_controllers trait method
src/mux/modes/toggle.rs	Updates toggle mode to report active controller changes
src/mux/modes/priority.rs	Updates priority mode to use new MuxOutput structure
src/mux/modes/average.rs	Updates average mode to use new MuxOutput structure
src/mux/manager.rs	Updates manager to pass IDs to RuntimeSettings initialization
src/demux/mod.rs	Moves DemuxRumbleTarget enum from runtime.rs to mod.rs
src/demux/runtime.rs	Removes DemuxRumbleTarget enum definition
src/demux/manager.rs	Updates import for DemuxRumbleTarget
src/utils/hide.rs	Adds file locking for Steam config modifications
src/tray/mod.rs	Replaces tokio::signal::ctrl_c with unix signal handlers
src/tray/app.rs	Adds Active variant to rumble menu and updates mode change handler
src/tray/config.rs	Updates types to use module-specific rumble enums
src/tray/state.rs	Updates types to use module-specific rumble enums
src/main.rs	Replaces ctrlc with signal-hook for SIGINT/SIGTERM handling
README.md	Adds cookbook section with examples and fixes grammar
Cargo.toml	Updates dependencies and removes ctrlc
Cargo.lock	Reflects dependency updates
flatpak/cargo-sources.json	Updates flatpak dependency sources
.vscode/settings.json	Adds spelling entries

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