Environment loading fixes (#19144)

Closes #19040
Addresses the problem with annoying error messages on windows (see
comment from SomeoneToIgnore on #18567)

Release Notes:

- Fixed the bug where language servers from PATH would sometimes be
prioritised over the ones from `direnv`
- Stopped running environment loading on windows as it didn't work
anyways due to `SHELL` not being set

crates/project/src/direnv.rs

@@ -1,7 +1,7 @@
 use crate::environment::EnvironmentErrorMessage;
 use std::process::ExitStatus;
 
-#[cfg(not(any(test, feature = "test-support")))]
+#[cfg(not(any(target_os = "windows", test, feature = "test-support")))]
 use {collections::HashMap, std::path::Path, util::ResultExt};
 
 #[derive(Clone)]
@@ -30,14 +30,18 @@ impl From<DirenvError> for Option<EnvironmentErrorMessage> {
     }
 }
 
-#[cfg(not(any(test, feature = "test-support")))]
-pub async fn load_direnv_environment(dir: &Path) -> Result<HashMap<String, String>, DirenvError> {
+#[cfg(not(any(target_os = "windows", test, feature = "test-support")))]
+pub async fn load_direnv_environment(
+    env: &HashMap<String, String>,
+    dir: &Path,
+) -> Result<HashMap<String, String>, DirenvError> {
     let Ok(direnv_path) = which::which("direnv") else {
         return Err(DirenvError::NotFound);
     };
 
     let Some(direnv_output) = smol::process::Command::new(direnv_path)
         .args(["export", "json"])
+        .envs(env)
         .env("TERM", "dumb")
         .current_dir(dir)
         .output()