feat: add osc52 support #76
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This adds support for writing to clipboard via OSC52 only if an SSH session is active. Read support, if supported, is often blocked by terminals or prompted for security reasons. This PR only adds write support for simplicity. Read support, though more complicated, can be added in a separate PR since it requires reading the terminal for response in an asynchronous manner which can also affect TUI applications using this library.
Fixes: #73