Release 1.0.11 raw-mode echo fix

[inxbit]

Summary

• release prismtty 1.0.11
• fix raw-mode/ECHO-off interactive echo surfacing for ssh-style sessions
• keep recent input bounded to the current line and clear it on submit/abort controls

Validation

• cargo fmt --check
• git diff --check
• cargo test --locked
• cargo clippy --locked --all-targets -- -D warnings
• cargo package --allow-dirty --locked --no-verify
• cargo run --locked --bin prismtty -- --version
• cargo run --locked --bin ptty -- --version
• node --test tests/release_security.test.mjs
• bash scripts/privacy-scan.sh