Add error handling to the lazy plugin manager bootstrap

[jpoliv]

Please consider picking the following Folke's commit that adds error handling to the plugin manager bootstrap.

Kickstart.nvim commit:

• nvim-lua/kickstart.nvim@3e55ff1

Notes

• the commit has been merged to the kickstart.nvim project via the pull request 1001
• Folke's also suggests a "prettier" alternative on the pull request description

[chrisgrieser]

If you have identified a problem and also have the solution ready, why aren't you making a PR?