Change Details

``` Summary of changes: * Add a TOC to the page * Make tips and tricks section use h3 headings * Reformat and clarify some sections ``` Backport of core PR12759 https://github.com/bitcoin/bitcoin/pull/12759/files Depends on D3944.

``` Summary of changes: * Add a TOC to the page * Make tips and tricks section use h3 headings * Reformat and clarify some sections ``` Backport of core PR12759 https://github.com/bitcoin/bitcoin/pull/12759/files Depends on D3961.

``` Summary of changes: * Add a TOC to the page * Make tips and tricks section use h3 headings * Reformat and clarify some sections ``` Backport of core PR12759 https://github.com/bitcoin/bitcoin/pull/12759/files Depends on D394461.