feat(ecma): import statements (#759)

Author: kiyoon

queries/ecma/textobjects.scm

@@ -292,3 +292,48 @@
   (export_statement)
   (lexical_declaration)
 ] @statement.outer
+
+; 1.  default import
+(import_statement
+  (import_clause
+    (identifier) @parameter.inner @parameter.outer))
+
+; 2.  namespace import  e.g. `* as React`
+(import_statement
+  (import_clause
+    (namespace_import
+      (identifier) @parameter.inner) @parameter.outer))
+
+; 3.  named import  e.g. `import { Bar, Baz } from ...`
+(import_statement
+  (import_clause
+    (named_imports
+      (import_specifier) @parameter.inner)))
+
+; 3‑A.  named import followed by a comma
+((import_statement
+  (import_clause
+    (named_imports
+      (import_specifier) @_start
+      .
+      "," @_end)))
+  (#make-range! "parameter.outer" @_start @_end))
+
+; 3‑B.  comma followed by named import
+((import_statement
+  (import_clause
+    (named_imports
+      "," @_start
+      .
+      (import_specifier) @_end)))
+  (#make-range! "parameter.outer" @_start @_end))
+
+; 3-C.  only one named import without a comma
+(import_statement
+  (import_clause
+    (named_imports
+      "{"
+      .
+      (import_specifier) @parameter.outer
+      .
+      "}")))