adding initial base config from astrovim

lua/configs/which-key-register.lua

@@ -0,0 +1,55 @@
+local is_available = astronvim.is_available
+local user_plugin_opts = astronvim.user_plugin_opts
+local mappings = {
+  n = {
+    ["<leader>"] = {
+      f = { name = "File" },
+      p = { name = "Packages" },
+      l = { name = "LSP" },
+      u = { name = "UI" },
+    },
+  },
+}
+
+local extra_sections = {
+  b = "Buffers",
+  D = "Debugger",
+  g = "Git",
+  s = "Search",
+  S = "Session",
+  t = "Terminal",
+}
+
+local function init_table(mode, prefix, idx)
+  if not mappings[mode][prefix][idx] then mappings[mode][prefix][idx] = { name = extra_sections[idx] } end
+end
+
+-- TODO v3: remove vim.g.heirline_bufferline check
+if is_available "heirline.nvim" and vim.g.heirline_bufferline then init_table("n", "<leader>", "b") end
+
+if is_available "neovim-session-manager" then init_table("n", "<leader>", "S") end
+
+if is_available "gitsigns.nvim" then init_table("n", "<leader>", "g") end
+
+if is_available "toggleterm.nvim" then
+  init_table("n", "<leader>", "g")
+  init_table("n", "<leader>", "t")
+end
+
+if is_available "telescope.nvim" then
+  init_table("n", "<leader>", "s")
+  init_table("n", "<leader>", "g")
+end
+
+if is_available "nvim-dap" then init_table("n", "<leader>", "D") end
+
+if is_available "Comment.nvim" then
+  for _, mode in ipairs { "n", "v" } do
+    if not mappings[mode] then mappings[mode] = {} end
+    if not mappings[mode].g then mappings[mode].g = {} end
+    mappings[mode].g.c = "Comment toggle linewise"
+    mappings[mode].g.b = "Comment toggle blockwise"
+  end
+end
+
+astronvim.which_key_register(user_plugin_opts("which-key.register", mappings))