fix(cmp): reduce blink-ripgrep freeze in complex directories

- Increase prefix_min_len from 2 to 3 to reduce trigger frequency
- Move context_size to correct backend scope and set to 0
- Add --max-count=5 to limit rg output per file

Fixes #1574

Author: ayamir

lua/modules/configs/completion/blink.lua

@@ -81,12 +81,13 @@ local opts = {
 				module = "blink-ripgrep",
 				name = "Ripgrep",
 				opts = {
-					prefix_min_len = 2,
+					prefix_min_len = 3,
 					backend = {
 						use = "ripgrep",
+						context_size = 0,
 						ripgrep = {
-							context_size = 5,
 							max_filesize = "1M",
+							additional_rg_options = { "--max-count=5" },
 						},
 					},
 				},