feat(fennel)!: switch to maintained parser (#6132)

Change the Fennel parser to a simpler and more consistent one, along with updating all the queries.

queries/fennel/folds.scm

@@ -1,11 +1,35 @@
 [
   (list)
   (table)
-  (sequential_table)
-  (let)
-  (fn)
-  (let_clause)
-  (quoted_list)
-  (local)
-  (global)
+  (sequence)
 ] @fold
+
+(list
+  .
+  (symbol) @_let
+  (#eq? @_let "let")
+  .
+  (sequence) @fold) @fold
+
+(list
+  .
+  (symbol) @_local
+  (#eq? @_local "local")) @fold
+
+(list
+  .
+  (symbol) @_global
+  (#eq? @_global "global")) @fold
+
+(list
+  .
+  (symbol) @_fn
+  (#any-of? @_fn "fn" "lambda" "λ" "hashfn")) @fold
+
+(reader_macro
+  macro:
+    [
+      "'"
+      "`"
+    ]
+  expression: (_) @fold)