Pin node and yarn versions to avoid autogenerated diff on yarn install (#217)

Adds stability to release process, fixes diff like that:
https://github.com/reddit/devvit-docs/pull/205/changes?file-filters%5B%5D=.gz&file-filters%5B%5D=.lock

## 🧪 Testing Steps / Validation
<!-- add details on how this PR has been tested, include reproductions
and screenshots where applicable -->
Ran yarn install and there were no artifacts

## ✅ Checks
<!-- Make sure your pr passes the CI checks and do check the following
fields as needed - -->
- [ ] CI tests (if present) are passing
- [ ] Adheres to code style for repo
- [ ] Contributor License Agreement (CLA) completed if not a Reddit
employee

Co-authored-by: danil.radkovskyi <danil.radkovskyi@reddit.com>

Author: Krakabek

.gitignore

@@ -1,6 +1,14 @@
 # Dependencies
 /node_modules
 
+# .yarn - https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+
 # Generated files
 .docusaurus
 .cache-loader

.nvmrc

@@ -0,0 +1 @@
+24.18.0

.yarn/install-state.gz

@@ -4,3 +4,5 @@ approvedGitRepositories:
 enableScripts: true
 
 nodeLinker: node-modules
+
+yarnPath: .yarn/releases/yarn-4.18.0.cjs

.yarn/releases/yarn-4.18.0.cjs

@@ -67,5 +67,8 @@
       "last 1 safari version"
     ]
   },
-  "packageManager": "yarn@1.22.22+sha512.a6b2f7906b721bba3d67d4aff083df04dad64c399707841b7acf00f6b133b7ac24255f2652fa22ae3534329dc6180534e98d17432037ff6fd140556e2bb3137e"
+  "engines": {
+    "node": ">=24.0.0"
+  },
+  "packageManager": "yarn@4.18.0"
 }