adjust searcher heap usage

[mjkpolo]

It would be nice to change the max heap usage of the searcher in memory constrained environments like a cluster login node (which was killing helix when searching through large projects)

I posted this on the helix subreddit, and one of the commenters solved my issue and suggested I make a feature request. This is the patch that fixed my issue:

diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index f25e8254..ecfcacfc 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -2327,6 +2327,7 @@ fn format(&self, current_path: &Self::Data) -> Row {

                 std::thread::spawn(move || {
                     let searcher = SearcherBuilder::new()
+                        .heap_limit(Some(5*1024*1024))
                         .binary_detection(BinaryDetection::quit(b'\x00'))
                         .build();

I have never written rust but if someone could point me in the general direction of how to add an options to the config.toml file and pass it to the searcher builder I would be be willing to try and add this as a feature.