added a readme plus actions

.github/workflows/readme.yml

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+name: Lint README.md
+
+on:
+  push:
+    paths:
+      - 'README.md'  # Trigger only when README.md is modified
+    branches: [main]  # Trigger on pushes to the main branch
+  pull_request:
+    paths:
+      - 'README.md'  # Trigger only when README.md is modified
+    branches: [main]  # Also trigger on pull requests to main
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3  # Checkout the repository
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16  # Use Node.js version 16
+      - run: npm install -g markdownlint-cli  # Install markdownlint-cli
+      - run: markdownlint README.md  # Lint the README.md file

README.md

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+# Mastadon utils
+
+Some mastadon utilities I wrote
+
+## Latest build statuses
+
+| Workflow | Status |
+|---|:---|
+| Lint README.md | ![Lint README.md status badge](https://github.com/USERNAME/REPOSITORY/actions/workflows/readme.yml/badge.svg) |