feat(robot)!: update parser and queries

Breaking change: replaced `(variable_definition)` by
`(scalar_variable)`, `(list_variable)` and `(dictionary_variable)`.

Also mark queries as unmaintained.

SUPPORTED_LANGUAGES.md

@@ -245,7 +245,7 @@ jsx (queries only)[^jsx] | unstable | `HFIJ ` | @steelsojka
 [rescript](https://github.com/rescript-lang/tree-sitter-rescript) | unstable | `HFIJL` | @ribru17
 [rifleconf](https://github.com/purarue/tree-sitter-rifleconf) | unstable | `H  J ` | @purarue
 [rnoweb](https://github.com/bamonroe/tree-sitter-rnoweb) | unstable | `HF J ` | @bamonroe
-[robot](https://github.com/Hubro/tree-sitter-robot) | stable | `HFIJ ` | @Hubro
+[robot](https://github.com/Hubro/tree-sitter-robot) | unmaintained | `HFIJ ` | 
 [robots_txt](https://github.com/opa-oz/tree-sitter-robots-txt) | unstable | `H  J ` | @opa-oz
 [roc](https://github.com/faldor20/tree-sitter-roc) | unmaintained | `H IJL` | 
 [ron](https://github.com/tree-sitter-grammars/tree-sitter-ron) | unstable | `HFIJL` | @amaanq

lua/nvim-treesitter/parsers.lua

@@ -1922,11 +1922,10 @@ return {
   },
   robot = {
     install_info = {
-      revision = 'v1.2.0',
+      revision = 'v1.3.0',
       url = 'https://github.com/Hubro/tree-sitter-robot',
     },
-    maintainers = { '@Hubro' },
-    tier = 1,
+    tier = 3,
   },
   robots_txt = {
     install_info = {

runtime/queries/robot/highlights.scm

@@ -10,7 +10,13 @@
   (test_case_setting)
 ] @keyword
 
-(variable_definition
+(scalar_variable
+  (variable_name) @variable)
+
+(list_variable
+  (variable_name) @variable)
+
+(dictionary_variable
   (variable_name) @variable)
 
 (keyword_definition