Review and Simplify Default Keyboard Shortcuts

Several default keyboard shortcuts in RemNote currently utilize combinations of three or even four keys, which can be cumbersome and difficult to remember. Many comparable applications, such as Obsidian, predominantly utilize two-key combinations for their shortcuts.

Simplifying RemNote's default shortcuts to favor two-key combinations where possible would improve usability and make the application more accessible to users. This would involve a review of existing shortcuts and a potential reorganization to optimize for efficiency and ease of use.