This change updates `gh variable delete` and `gh secret delete` to use the host associated with the repository rather than the default host. Along with these changes is minor refactoring of the tests to ensure appropriate Dotcom vs GHES targeting works as expected.
Minor edit to `gh variable get` testing to simplify some conditional logic in test setup.
- gh help actions
- highlight 3 commands to run for more information
- gh extension
- wrapping url for online linking
- fix install subcommand missing backtick formatting
- gh release create
- fixing mixed indenting causing usage misalignment
- root help
- backtick wrap help command for more info for consistency
- gh help environment
- backtick wrap missed OWNER/REPO
- gh variable
- brought consistency to output when deleting or setting variable
