ref(nix): drop neovim legacy support

nix/home/common/neovim/nvim/snippets/package.json

@@ -0,0 +1,35 @@
+{
+	"name": "leana-snippets",
+	"contributes": {
+		"snippets": [
+			{
+				"language": "c",
+				"path": "./c.json"
+			},
+			{
+				"language": "python",
+				"path": "./python.json"
+			},
+			{
+				"language": "rust",
+				"path": "./rust.json"
+			},
+			{
+				"language": "scala",
+				"path": "./scala.json"
+			},
+			{
+				"language": "tex",
+				"path": "./tex.json"
+			},
+			{
+				"language": "typst",
+				"path": "./typst.json"
+			},
+			{
+				"language": "xml",
+				"path": "./xml.json"
+			}
+		]
+	}
+}