Early stage and part of goose's broader move to ACP

#6642 #7309

The TUI automatically launches the goose ACP server using the goose acp command.

When running from source, npm start automatically builds the Rust binary from the workspace root if needed:

cd ui/text
npm i
npm run start

The dev:binary script checks if the Rust binary needs rebuilding by comparing timestamps of:

• target/release/goose binary
• Cargo.toml and Cargo.lock
• crates/goose-cli/Cargo.toml

If any source files are newer, it runs cargo build --release -p goose-cli automatically.

In production, the TUI uses prebuilt binaries from the @aaif/goose-binary-* packages installed via postinstall.

To use a custom server URL instead of the built-in binary:

npm run start -- --server http://localhost:8080