refactor: setup renovate to manage dependencies

This should make it easier to keep the repo up to date.

.editorconfig

@@ -0,0 +1,14 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+
+[*.{nix,toml,json}]
+indent_style = space
+indent_size = 2
+
+[*.rs]
+indent_style = space
+indent_size = 4

.renovaterc.json

@@ -0,0 +1,34 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "assignees": [
+    "jalil"
+  ],
+  "automerge": true,
+  "automergeStrategy": "fast-forward",
+  "automergeType": "pr",
+  "commitBodyTable": true,
+  "dependencyDashboard": true,
+  "extends": [
+    "config:recommended"
+  ],
+  "prCreation": "immediate",
+  "cargo": {
+    "commitMessageTopic": "Rust crate {{depName}}",
+    "fileMatch": [
+      "(^|/)Cargo\\.toml$"
+    ],
+    "versioning": "cargo",
+    "enabled": true
+  },
+  "nix": {
+    "fileMatch": [
+      "(^|/)flake\\.nix$"
+    ],
+    "commitMessageTopic": "flake inputs",
+    "commitMessageExtra": "to {{newValue}}",
+    "enabled": true
+  },
+  "automergeSchedule": [
+    "* 0-1 * * *"
+  ]
+}

renovate.json

@@ -1,3 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
-}