Nvim: Configure plugins in after directory

Switch from fzf to telescope and filesystem to defx

.config/nvim/after/plugin/treesitter.rc.vim

@@ -0,0 +1,17 @@
+" Tree-sitter configuration
+lua <<EOF
+require'nvim-treesitter.configs'.setup {
+  highlight = {
+    enable = true,
+  },
+  ensure_installed = {
+    "bash",
+    "c",
+    "cmake",
+    "cpp",
+    "fish",
+    "lua",
+    "rust",
+  }
+}
+EOF