feat(nvim): Add support for which key

tools/nvim/lua/keymaps/which.lua

@@ -0,0 +1,23 @@
+local wk = require("which-key")
+wk.add({
+  -- https://github.com/folke/which-key.nvim/tree/main?tab=readme-ov-file#%EF%B8%8F-mappings
+  {
+    -- Nested mappings are allowed and can be added in any order
+    -- Most attributes can be inherited or overridden on any level
+    -- There's no limit to the depth of nesting
+    mode = { "n" },
+    { "<leader>b", group = "Buffer" }, -- no need to specify mode since it's inherited
+    { "<leader>c", group = "Code/Compile" },
+    { "<leader>f", group = "File" },
+    { "<leader>p", group = "Project" },
+    { "<leader>q", group = "Quit" },
+    { "<leader>t", group = "Toggle" },
+    { "<leader>u", group = "UI" },
+    { "<leader>w", group = "Window" },
+  },
+  {
+    "l",
+    mode = { "o", "x" },
+    group = "inside",
+  },
+})