feat(hid): support G602 nano receiver

[Stanley5249]

Summary

Add initial support for the G602's 046d:c537 Nano receiver.

Changes

• openlogi-core / openlogi-hidpp: recognize c537 through the existing Unifying-compatible receiver path
• openlogi-hid: fix a Windows rustdoc link exposed by the local gate

Testing

• cargo fmt --all -- --check
• cargo clippy --workspace --all-targets -- -D warnings
• cargo test --workspace
• RUSTDOCFLAGS="-D warnings" cargo doc -p openlogi-hid -p openlogi-hidpp -p openlogi-hidpp-derive --no-deps --document-private-items
• Not runtime-tested on G602 hardware

Fixes #448

[greptile-apps]

Greptile Summary

The PR adds the G602 Nano receiver (046d:c537) to the existing Unifying-compatible receiver path and corrects a Windows rustdoc link.

• Recognizes c537 during receiver classification and route construction.
• Allows HID++ receiver detection to instantiate the Unifying implementation for 046d:c537.
• Updates the transport documentation link to resolve correctly under the Windows documentation gate.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
crates/openlogi-core/src/hid/route.rs	Adds 0xc537 to the centralized Unifying-compatible PID set, consistently affecting classification, routing, display naming, pairing-family selection, and receiver child-node filtering.
crates/openlogi-hid/src/transport.rs	Corrects an intra-doc link without changing runtime transport behavior.
crates/openlogi-hidpp/src/receiver/unifying.rs	Adds 046d:c537 to the VID/PID allowlist used to detect and construct Unifying-compatible receivers.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
    USB["USB receiver 046d:c537"] --> Classify["Receiver PID classification"]
    Classify --> Route["DeviceRoute::Unifying"]
    Classify --> Detect["HID++ Unifying receiver detection"]
    Detect --> Inventory["Receiver and paired-device inventory"]
    Route --> Control["Paired-device HID++ control"]

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_{Reviews (2): Last reviewed commit: "Merge branch 'master' into feat/g602-rec..." | Re-trigger Greptile}