[neovim] Disables Meson. Updates keymaps a bit.

home-manager/features/neovim/config/lua/plugins/disabled.lua

@@ -0,0 +1,4 @@
+return {
+    -- Maeson installs it's own binaries that are incompatible with NixOS.
+    { "williamboman/mason.nvim", enabled = false },
+}

home-manager/features/neovim/config/lua/plugins/telescope.lua

@@ -0,0 +1,13 @@
+return {
+  "nvim-telescope/telescope.nvim",
+  keys = {
+    -- Switch the default keybind to switch buffers instead of find files
+    {
+      "<leader><space>",
+      "<cmd>Telescope buffers sort_mru=true sort_lastused=true<cr>",
+      desc = "Open Files",
+    },
+    -- Disable the <leader><comma> since it's so hard to type and redundant with the above.
+    { "<leader><comma>", false },
+  },
+}