Close #19: Verbose flag

[theodoregraham1]

What does this PR do?

Closes #19: adds a --verbose flag which parses and renders all present x509 extensions when present on inspect.

To do this, adds a new struct VerboseCert which aggregates CertInfo.

When the verbose flag is triggered, processing splits from the normal pipeline in inspect::run and follows a parallel process.

Additionally, in terminal, the existing rendering functions have been split into render_cert_body which renders the header and body of the box and render_cert_bottom which renders the footer/bottom of the box.

How to test

Execute sslx inspect --verbose or cargo run --package sslx --bin sslx -- --verbose inspect [FILE]

Checklist

• cargo test passes
• cargo clippy clean
• cargo fmt applied