radicle/profile: No pager from Git on Windows

Git for Windows horribly mangles the configured binaries through a POSIX
`sh`-like environment even on Windows. We might be able to figure out
which `sh.exe` we would have to execute on Windows, but this is too
brittle. Windows users will have to use other mechanisms (like `$EDITOR`
and `$PAGER`) to configure their programs.

crates/radicle-term/src/editor.rs

@@ -211,11 +211,16 @@ fn default_editor() -> Option<OsString> {
             return Some(editor.into());
         }
     }
+
     // Check Git. The user might have configured their editor there.
-    #[cfg(feature = "git2")]
+    // On Windows, custom editors configured via Git are not supported,
+    // because of the complexity surrounding how the editor command is
+    // parsed and executed. See also <https://stackoverflow.com/a/773973/1835188>.
+    #[cfg(all(feature = "git2", not(windows)))]
     if let Ok(path) = git2::Config::open_default().and_then(|cfg| cfg.get_path("core.editor")) {
         return Some(path.into_os_string());
     }
+
     // On macOS, `nano` is installed by default and it's what most users are used to
     // in the terminal.
     if cfg!(target_os = "macos") && exists("nano") {

crates/radicle/src/profile.rs

@@ -88,6 +88,10 @@ pub mod env {
 
     /// Get the configured pager program from the environment.
     pub fn pager() -> Option<String> {
+        // On Windows, custom pagers configured via Git are not supported,
+        // because of the complexity surrounding how the pager command is
+        // parsed and executed. See also <https://stackoverflow.com/a/773973/1835188>.
+        #[cfg(not(windows))]
         if let Ok(cfg) = crate::git::raw::Config::open_default() {
             if let Ok(pager) = cfg.get_string("core.pager") {
                 return Some(pager);