dsh-peak-balance: Peak/Off-Peak Billing Clock and Balance Monitoring for DSH-TUI

`dsh-peak-balance` is a billing-monitoring plugin for dsh-TUI that provides a peak/off-peak clock, balance display, single-turn cost measurement, a usage history grid, and quota diagnostics. The plugin supports balance reading from multiple providers, custom rate configuration, and peak-time pulse warnings, and it can display Token usage history intuitively through a GitHub-style grid. Users need to install it via npm or a local path, and restart the TUI after installation for it to take effect. This tool is designed to help developers manage resources and costs visually.