[codex] v0.1.8 render command and help

[cowboycodr]

Summary

• Add glass --render / --dump-render for full-page ANSI debug snapshots ending with the status bar.
• Automatically render the same ANSI snapshot when glass <path> writes to redirected or piped stdout.
• Add a thorough --help / -h launch mode that documents usage, render options, output behavior, keybindings, commands, mouse behavior, and examples.
• Match the render debug ANSI color conversion to Crossterm palette indices so status-bar colors line up with the live app.

Validation

• cargo fmt --all -- --check
• cargo test --locked
• cargo build --release --locked
• cargo run --quiet -- --help | sed -n '1,80p'
• cargo run --quiet -- benchmark.md > /tmp/glass-auto-render.ansi && tail -n 1 /tmp/glass-auto-render.ansi
• cargo run --quiet -- benchmark.md | head -n 1