Show GPU brand + cli fix for iGPUs

The GPU brand is shown in the GUI and CLI, and I fixed the CLI for iGPUs which broke in the last commit

added context length calc

Uses the config.json present in model model repos. Needs a fall back option too tho, and maybe KV quant

added context length calc

Uses the config.json present in model model repos. Needs a fall back option too tho, and maybe KV quant

Update README.md

fixed md