Remove obsolete Pending Transfers section from README (#174)

* Fix #67: Add sync pause and sync resume commands

Wire psync_pause() and psync_resume() from the C library into the RPC
command layer, registering SYNCPAUSE and SYNCRESUME handlers and exposing
them as 'sync pause' and 'sync resume' CLI subcommands.

Note: daemon quit is already handled by the existing 'finalize' command,
which calls psync_destroy() and exits the daemon process cleanly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Remove obsolete Pending Transfers section from README

The pending command now provides a proper way to check for pending
transfers, making the manual cache-inspection workaround obsolete.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Levi Neely <lkn@darkstar.example.net>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -14,14 +14,6 @@ I aim to support as many distributions as possible. I maintain a package for [AU
 
 My code audits are best-effort, and I make security enhancements as I identify problems. However, I *do not* promise that this program is free of even older and well-known security vulnerabilities. Therefore, I recommend using this program only on a *trusted single-user* system. **Security-related code audits and contributions are most welcome!**
 
-## Pending Transfers
-
-Stopping the daemon will break pending background transfers!
-`pcloudcc` does not currently provide a command to check for pending
-transfers. You can currently check this by ensuring there is only one
-file named `cached` in `~/.pcloud/Cache`. Usually this is a large
-file.
-
 # See Also
 
 - [Contributing](./doc/CONTRIBUTING.md): Read this if you're interested in