Update helix config

.config/helix/config.toml

@@ -1,4 +1,4 @@
-theme = "paramount"
+theme = "paramount-dark"
 
 [editor]
 middle-click-paste = false
@@ -31,3 +31,5 @@ skip-levels = 1
 [keys.normal]
 "C-left" = ["move_prev_word_start", "collapse_selection"]
 "C-right" = ["move_next_word_start", "collapse_selection"]
+"A-d" = "delete_selection"
+"d" = "delete_selection_noyank"

.config/helix/languages.toml

@@ -0,0 +1,9 @@
+[[language]]
+name = "rust"
+scope = "source.rust"
+indent = { tab-width = 4, unit = "	" }
+
+[[language]]
+name = "nix"
+auto-format = true
+formatter = { command = "nixfmt" }