Respect server capabilities on queries (#33538)

Closes https://github.com/zed-industries/zed/issues/33522

Turns out a bunch of Zed requests were not checking their capabilities
correctly, due to odd copy-paste and due to default that assumed that
the capabilities are met.

Adjust the code, which includes the document colors, add the test on the
colors case.

Release Notes:

- Fixed excessive document colors requests for unrelated files

crates/project/src/project.rs

@@ -779,13 +779,42 @@ pub struct DocumentColor {
     pub color_presentations: Vec<ColorPresentation>,
 }
 
-#[derive(Clone, Debug, PartialEq)]
+impl Eq for DocumentColor {}
+
+impl std::hash::Hash for DocumentColor {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        self.lsp_range.hash(state);
+        self.color.red.to_bits().hash(state);
+        self.color.green.to_bits().hash(state);
+        self.color.blue.to_bits().hash(state);
+        self.color.alpha.to_bits().hash(state);
+        self.resolved.hash(state);
+        self.color_presentations.hash(state);
+    }
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
 pub struct ColorPresentation {
     pub label: String,
     pub text_edit: Option<lsp::TextEdit>,
     pub additional_text_edits: Vec<lsp::TextEdit>,
 }
 
+impl std::hash::Hash for ColorPresentation {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        self.label.hash(state);
+        if let Some(ref edit) = self.text_edit {
+            edit.range.hash(state);
+            edit.new_text.hash(state);
+        }
+        self.additional_text_edits.len().hash(state);
+        for edit in &self.additional_text_edits {
+            edit.range.hash(state);
+            edit.new_text.hash(state);
+        }
+    }
+}
+
 #[derive(Clone)]
 pub enum DirectoryLister {
     Project(Entity<Project>),