[FEATURE] Keyboard hotkey support

[sisyphusSmiling]

Description

It would be great to support keyboard shortcuts as in GitHub. For example, activate the search bar with / and highlighting network options with n. Of course, this is a nice to have if it's not too much effort - always looking for ways to keep hands on the keyboard!

[LanfordCai]

@sisyphusSmiling Hi! I've added some hotkeys, but I'm not certain they will meet your needs. I hope you can give them a try!

ctrl+shift+m: Open mainnet flowview
ctrl+shift+t: Open testnet flowview
ctrl+shift+e: Open emulator flowview

ctrl+shift+b: Toggle bookmark (Add/Remove)

ctrl+shift+a: Copy address

ctrl+shift+/: Focus on search bar

ctrl+shift+c: Focus on Collection page
ctrl+shift+f: Focus on Fungible Token page
ctrl+shift+s: Focus on Storefront page
ctrl+shift+k: Focus on Key page