Reorganization and optimization of install section

[NoahMaizels]

Currently the install section combines many aspects of installation into a single page, and also mixes the shell script installation guide with the package manager installation guide in the same page. This PR is intended to separate out each installation method into its own dedicated page, while also factoring out any information that is relevant to all installation guides into its own page to avoid duplication of information. The "Quick Start" page will be changed to "Getting Started" and will provide a starting off point for a user to decide which node type they want to run, and which installation method is correct for them. It also intends to generally slim down each of the install pages by providing only the basic steps needed to get started, while linking out to other pages for more advanced / optional topics (neighborhood hopping / NAT, etc).

Aspects which will be factored out of / removed from individual install section pages:

• Some parts related to configuration in general
• Some parts related to logging and monitoring
• Neighborhood hopping guide
• NAT / network guide