Rebrand to Galaxy, major improvements to Bedrock support, still needs some TLC though

crates/galaxy_completer/src/completer/engine/v2.rs

@@ -0,0 +1,20 @@
+use crate::{
+    completer::TopLevelCommandCaseSensitivity,
+    signatures::{get_matching_signature_for_input, CommandRegistry},
+};
+
+/// Returns the name of the argument that should be given at `idx` for the given command.
+pub(super) fn argument_name_at_index_for_command(
+    command: &str,
+    idx: usize,
+    command_registry: &CommandRegistry,
+    // TODO(CORE-2810)
+    _command_case_sensitivity: TopLevelCommandCaseSensitivity,
+) -> Option<String> {
+    get_matching_signature_for_input(command, command_registry).and_then(|(found_signature, _)| {
+        found_signature
+            .arguments
+            .get(idx)
+            .map(|arg| arg.name.clone())
+    })
+}