* feat(hub): enable Run/New Chat for downloaded GGUF models, fix README bottom spacing
- enable the Run / New Chat action for GGUF models that are already downloaded, across the download card, on-device card, and hub page
- remove the extra bottom spacing under the model inspector README
* fix(hub): sync active GGUF variant on mount
* feat(hub): open a new chat immediately when Run is clicked
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Co-authored-by: Lee Jackson <130007945+Imagineer99@users.noreply.github.com>