VS Code companion extension for dsh-TUI

Key features

• Real terminal, not emulationThe session runs in the VS Code integrated terminal (your default shell), with all the native capabilities of the terminal: shell integration, native Ctrl+C, copy-paste, font theme following.
• This is an implementation of ccch1mneyyy/dsh-TUI#161.
• Start / open multiple timesClick the whale button on the right side of the editor tab bar, or command dsh-tui: Start new session / Start a new session - each time a new DeepSeek terminal is opened on the other side of the editor area and dsh-tui is automatically run
• Session = real terminalThe extension is only responsible for createTerminal and sending startup commands. Processes, signals, scrolling, copy and paste are all hosted by the VS Code terminal (the same architecture as the official extension).