zeta2: Parse imports via Tree-sitter queries + improve zeta retrieval-stats (#39735)

Release Notes:

- N/A

---------

Co-authored-by: Max <max@zed.dev>
Co-authored-by: Agus <agus@zed.dev>
Co-authored-by: Oleksiy <oleksiy@zed.dev>

crates/languages/src/python/config.toml

@@ -35,3 +35,4 @@ decrease_indent_patterns = [
   { pattern = "^\\s*except\\b.*:\\s*(#.*)?",  valid_after = ["try", "except"] },
   { pattern = "^\\s*finally\\b.*:\\s*(#.*)?", valid_after = ["try", "except", "else"] },
 ]
+import_path_strip_regex = "/__init__\\.py$"

crates/languages/src/python/imports.scm

@@ -0,0 +1,32 @@
+(import_statement
+    name: [
+        (dotted_name
+            ((identifier) @namespace ".")*
+            (identifier) @namespace .)
+        (aliased_import
+            name: (dotted_name
+                ((identifier) @namespace ".")*
+                (identifier) @namespace .))
+    ]) @wildcard @import
+
+(import_from_statement
+    module_name: [
+        (dotted_name
+            ((identifier) @namespace ".")*
+            (identifier) @namespace .)
+        (relative_import
+            (dotted_name
+                ((identifier) @namespace ".")*
+                (identifier) @namespace .)?)
+    ]
+    (wildcard_import)? @wildcard
+    name: [
+        (dotted_name
+            ((identifier) @namespace ".")*
+            (identifier) @name .)
+        (aliased_import
+            name: (dotted_name
+                ((identifier) @namespace ".")*
+                (identifier) @name .)
+            alias: (identifier) @alias)
+    ]?) @import