## Summary of the Pull Request
This extends the copy command to be able to include control sequences,
for use in tools that subsequently know how to parse and display that.
## References and Relevant Issues
https://github.com/microsoft/terminal/issues/15703
## Detailed Description of the Pull Request / Additional comments
At a high level, this:
- Expands the `CopyTextArgs` to have a `withControlSequences` bool.
- Plumbs that bool down through many layers to where we actuall get
data out of the text buffer.
- Modifies the existing `TextBuffer::Serialize` to be more generic
and renames it to `TextBuffer::ChunkedSerialize`.
- Uses the new `ChunkedSerialize` to generate the data for the copy
request.
## Validation Steps Performed
To test this I've manually:
- Generated some styled terminal contents, copied it with the control
sequences, pasted it into a file, `cat`ed the file and seen that it
looks the same.
- Set `"firstWindowPreference": "persistedWindowLayout"` and
validated that the contents of windows are saved and
restored with styling intact.
I also checked that `Invoke-OpenConsoleTests` passed.
## PR Checklist
- [x] Closes#15703
- [ ] Tests added/passed
- [x] Documentation updated
- If checked, please file a pull request on [our docs
repo](https://github.com/MicrosoftDocs/terminal) and link it here:
https://github.com/MicrosoftDocs/terminal/pull/756
- [x] Schema updated (if necessary)
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