feat(nu): add nushell support

queries/nu/textobjects.scm

@@ -0,0 +1,78 @@
+(stmt_let) @assignment.outer
+
+(stmt_mut) @assignment.outer
+
+(stmt_const) @assignment.outer
+
+(stmt_let
+  value: (_) @assignment.inner)
+
+(stmt_mut
+  value: (_) @assignment.inner)
+
+(stmt_const
+  value: (_) @assignment.inner)
+
+(block) @block.outer
+
+(comment) @comment.outer
+
+(pipeline) @pipeline.outer
+
+(pipe_element) @pipeline.inner
+
+(decl_def) @function.outer
+
+(decl_def
+  body: (_) @function.inner)
+
+(ctrl_for) @loop.outer
+
+(ctrl_loop) @loop.outer
+
+(ctrl_while) @loop.outer
+
+(ctrl_for
+  body: (_) @loop.inner)
+
+(ctrl_loop
+  body: (_) @loop.inner)
+
+(ctrl_while
+  body: (_) @loop.inner)
+
+; Conditional inner counts the last one, rather than the current one.
+(ctrl_if
+  then_branch: (_) @conditional.inner
+  else_block: (_)? @conditional.inner) @conditional.outer
+
+(parameter) @parameter.outer
+
+(command
+  head: (_) @call.inner) @call.outer
+
+(where_command
+  predicate: (_) @call.inner) @call.outer
+
+; define pipeline first, because it should only match as a fallback
+; e.g., `let a = date now` should match the whole assignment.
+; But a standalone `date now` should also match a statement
+(pipeline) @statement.outer
+
+(stmt_let) @statement.outer
+
+(stmt_mut) @statement.outer
+
+(stmt_const) @statement.outer
+
+(ctrl_if) @statement.outer
+
+(ctrl_try) @statement.outer
+
+(ctrl_match) @statement.outer
+
+(ctrl_while) @statement.outer
+
+(ctrl_loop) @statement.outer
+
+(val_number) @number.inner