Copper Component Design

Recipe book for implementing a new copper-rs component — a `CuSrcTask`, `CuTask`, `CuSinkTask`, or `CuBridge`. Use when scaffolding a new crate under `components/` (or an app-local task): what the skeleton looks like, which lifecycle hooks to override, how to read the node's RON `config:` block, how to declare `Resources<'r>`, when `Freezable` needs a real impl vs the default. All patterns are anchored to real crates in `components/`. Complements `copper-arch` (traits + macro overview), `copper-api-flavor` (the taste rules for user-facing traits), and `copper-coding-style` (derives, error handling, no_std). For the RON side of the wiring see `copper-ron-config`; for build…