fix: add stage buffer key

.golangci.yml

@@ -322,7 +322,6 @@ linters:
           disabled: false
         # https://github.com/mgechev/revive/blob/master/RULES_DESCRIPTIONS.md#unexported-return
         - name: unexported-return
-          severity: warning
           disabled: true
         # https://github.com/mgechev/revive/blob/master/RULES_DESCRIPTIONS.md#unhandled-error
         - name: unhandled-error

nvim/lua/pluginconfig/which-key.lua

@@ -150,6 +150,7 @@ local mappings = {
         r = { "<cmd>lua require 'gitsigns'.reset_hunk()<cr>", "Reset Hunk" },
         R = { "<cmd>lua require 'gitsigns'.reset_buffer()<cr>", "Reset Buffer" },
         s = { "<cmd>lua require 'gitsigns'.stage_hunk()<cr>", "Stage Hunk" },
+        S = { "<cmd>lua require 'gitsigns'.stage_buffer()<cr>", "Stage Buffer" },
         u = {
             "<cmd>lua require 'gitsigns'.undo_stage_hunk()<cr>",
             "Undo Stage Hunk",