feature/roadmap: unified cecli vars

[ErichBSchulz]

Issue

This feature would lay out a pattern to support a wide variety of use cases. The available vars I'm imagining include:

• tokens (in, out, cached etc)
• execution time of last model call
• context tokens
• model calls since last "/clear" etc
• context file count
• pwd
• all the vars in the standard prompt
• now() (in a few flavours)
• config options
• etc etc

The vars could then be used to define templates for the following:

• TUI status bar lines (lower and upper)
• linear mode prompts
• standardised (TUI and linear) model call prefaces and postscript (ie to go in the scrollable console log in both modes)
• log formats (with several logs definable for different trigger events)
• embedding in custom commands
• ?? others

Each variable should be:

• cached
• lazy defined with some kind of performance tracking (as inevitably someone will make a bloated template and wonder why there experience is so laggy)
• vieweable within a complete list (~ export in bash) - ?? /vars

Version and model info

No response