task: Allow obtaining custom task variables from tree-sitter queries (#11624)

From now on, only top-level captures are treated as runnable tags and
the rest is appended to task context as custom environmental variables
(unless the name is prefixed with _, in which case the capture is
ignored). This is most likely gonna help with Pest-like test runners.



Release Notes:

- N/A

---------

Co-authored-by: Remco <djsmits12@gmail.com>

crates/language/src/language.rs

@@ -57,7 +57,9 @@ use std::{
 };
 use syntax_map::{QueryCursorHandle, SyntaxSnapshot};
 use task::RunnableTag;
-pub use task_context::{BasicContextProvider, ContextProvider, ContextProviderWithTasks};
+pub use task_context::{
+    BasicContextProvider, ContextProvider, ContextProviderWithTasks, RunnableRange,
+};
 use theme::SyntaxTheme;
 use tree_sitter::{self, wasmtime, Query, QueryCursor, WasmStore};
 use util::http::HttpClient;