feat: add standalone WIP Text View signatures

Render one Object or paired Interface entity without path/context, lookups or wire-schema changes. Preserve declarations, summaries, optional/unit and empty distinctions; validate protocol semantics and bounded input before rendering. Add five spec/nested goldens and 13 external API tests plus a standalone doctest.

Validation: cargo fmt --all -- --check; cargo check --workspace --all-targets; cargo test --workspace --all-targets; cargo test --workspace --doc; nix develop -c bash (cargo clippy --workspace --all-targets -- -D warnings, RUSTDOCFLAGS='-D warnings' cargo doc --workspace --no-deps, cargo run --package wip-public-api-example); git diff --check. All passed. Default shell lacks clippy; declared Nix dev shell supplied it.

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to the published WIP Rust crates are documented here.
 
 ## Unreleased
 
+- Adds `wip-text-view`, an independent single-entity Object/Interface signature
+  library with Protocol validation, typed errors, full ordered declarations,
+  documentation summaries and safe Text View quoting/escapes. No path, lookup,
+  cache, UI, network or Protocol wire-schema changes are required.
+
 - Breaking Protocol/HTTP migration from opaque Interface reference strings to
   exact `(scope, name)` records in Objects, fetches and calls, with optional
   opaque `scope_ref` metadata. Adds shape and placement-aware scope validation