feat: add configuration management and panel rendering
- Introduced a new `Config` struct for loading application configuration from a TOML file. - Added support for keybindings and panel configurations, including status widgets. - Implemented `PtyTerminal` for handling pseudo-terminal interactions. - Created a rendering module to manage the display of application windows, panels, and dropdowns. - Refactored the main application loop to utilize the new configuration and rendering logic. - Removed legacy code related to event handling and rendering from `main.rs`.
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Björn Blomberg