cleanup: refactor which-key configuration for cleaner setup (nvim-lua#1102)

- Moved `which-key` configuration from inline `config` to `opts` for better organization.
- Updated the key mappings setup to use `spec` for defining existing key chains.
- Removed deprecated or unnecessary comments and code.

This change aligns with updated `which-key` configuration practices, improving readability and maintainability as recommended by @VlaDexa in nvim-lua#1068.

Author: iton0

init.lua

@@ -274,57 +274,55 @@ require('lazy').setup({
   { -- Useful plugin to show you pending keybinds.
     'folke/which-key.nvim',
     event = 'VimEnter', -- Sets the loading event to 'VimEnter'
-    config = function() -- This is the function that runs, AFTER loading
-      require('which-key').setup {
-        icons = {
-          -- set icon mappings to true if you have a Nerd Font
-          mappings = vim.g.have_nerd_font,
-          -- If you are using a Nerd Font: set icons.keys to an empty table which will use the
-          -- default whick-key.nvim defined Nerd Font icons, otherwise define a string table
-          keys = vim.g.have_nerd_font and {} or {
-            Up = '<Up> ',
-            Down = '<Down> ',
-            Left = '<Left> ',
-            Right = '<Right> ',
-            C = '<C-…> ',
-            M = '<M-…> ',
-            D = '<D-…> ',
-            S = '<S-…> ',
-            CR = '<CR> ',
-            Esc = '<Esc> ',
-            ScrollWheelDown = '<ScrollWheelDown> ',
-            ScrollWheelUp = '<ScrollWheelUp> ',
-            NL = '<NL> ',
-            BS = '<BS> ',
-            Space = '<Space> ',
-            Tab = '<Tab> ',
-            F1 = '<F1>',
-            F2 = '<F2>',
-            F3 = '<F3>',
-            F4 = '<F4>',
-            F5 = '<F5>',
-            F6 = '<F6>',
-            F7 = '<F7>',
-            F8 = '<F8>',
-            F9 = '<F9>',
-            F10 = '<F10>',
-            F11 = '<F11>',
-            F12 = '<F12>',
-          },
+    opts = {
+      icons = {
+        -- set icon mappings to true if you have a Nerd Font
+        mappings = vim.g.have_nerd_font,
+        -- If you are using a Nerd Font: set icons.keys to an empty table which will use the
+        -- default whick-key.nvim defined Nerd Font icons, otherwise define a string table
+        keys = vim.g.have_nerd_font and {} or {
+          Up = '<Up> ',
+          Down = '<Down> ',
+          Left = '<Left> ',
+          Right = '<Right> ',
+          C = '<C-…> ',
+          M = '<M-…> ',
+          D = '<D-…> ',
+          S = '<S-…> ',
+          CR = '<CR> ',
+          Esc = '<Esc> ',
+          ScrollWheelDown = '<ScrollWheelDown> ',
+          ScrollWheelUp = '<ScrollWheelUp> ',
+          NL = '<NL> ',
+          BS = '<BS> ',
+          Space = '<Space> ',
+          Tab = '<Tab> ',
+          F1 = '<F1>',
+          F2 = '<F2>',
+          F3 = '<F3>',
+          F4 = '<F4>',
+          F5 = '<F5>',
+          F6 = '<F6>',
+          F7 = '<F7>',
+          F8 = '<F8>',
+          F9 = '<F9>',
+          F10 = '<F10>',
+          F11 = '<F11>',
+          F12 = '<F12>',
         },
-      }
 
-      -- Document existing key chains
-      require('which-key').add {
-        { '<leader>c', group = '[C]ode', mode = { 'n', 'x' } },
-        { '<leader>d', group = '[D]ocument' },
-        { '<leader>r', group = '[R]ename' },
-        { '<leader>s', group = '[S]earch' },
-        { '<leader>w', group = '[W]orkspace' },
-        { '<leader>t', group = '[T]oggle' },
-        { '<leader>h', group = 'Git [H]unk', mode = { 'n', 'v' } },
-      }
-    end,
+        -- Document existing key chains
+        spec = {
+          { '<leader>c', group = '[C]ode', mode = { 'n', 'x' } },
+          { '<leader>d', group = '[D]ocument' },
+          { '<leader>r', group = '[R]ename' },
+          { '<leader>s', group = '[S]earch' },
+          { '<leader>w', group = '[W]orkspace' },
+          { '<leader>t', group = '[T]oggle' },
+          { '<leader>h', group = 'Git [H]unk', mode = { 'n', 'v' } },
+        },
+      },
+    },
   },
 
   -- NOTE: Plugins can specify dependencies.