Update nvim config: terminal layout, colorschemes, and vimade

Reposition terminal and Claude Code windows relative to current window
at 30% height, add multiple colorschemes with oxocarbon as default,
and add vimade plugin with blocklist to keep Claude terminal unfaded.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

nvim/lua/config/keymaps.lua

@@ -1,3 +1,15 @@
 -- Keymaps are automatically loaded on the VeryLazy event
 -- Default keymaps that are always set: https://github.com/LazyVim/LazyVim/blob/main/lua/lazyvim/config/keymaps.lua
 -- Add any additional keymaps here
+
+-- Terminal: open relative to current window (don't squash explorer) and smaller
+local terminal_opts = {
+  cwd = LazyVim.root(),
+  win = { position = "bottom", height = 0.3, relative = "win" },
+}
+vim.keymap.set({ "n", "t" }, "<c-/>", function()
+  Snacks.terminal(nil, terminal_opts)
+end, { desc = "Terminal (Root Dir)" })
+vim.keymap.set({ "n", "t" }, "<c-_>", function()
+  Snacks.terminal(nil, terminal_opts)
+end, { desc = "which_key_ignore" })