Rollup merge of #59748 - agnxy:trademark, r=skade
Rollup merge of #59748 - agnxy:trademark, r=skade

Add summary and reference to Rust trademark guide

Fix #53287
cc @steveklabnik

graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust