Add GitHub actions for tests

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

@@ -0,0 +1,49 @@
+name: CI
+
+on:
+  pull_request:
+    paths-ignore:
+      - "**.md"
+  merge_group:
+    paths-ignore:
+      - "**.md"
+  push:
+    paths-ignore:
+      - "**.md"
+    branches:
+      - master
+
+jobs:
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - run: RUSTFLAGS="--deny warnings" cargo clippy
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo test --all-features
+
+  check-format:
+    name: check format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+          components: rustfmt
+      - run: cargo fmt --check
+
+  all-jobs-succeed:
+    name: All checks succeeded
+    if: success()
+    runs-on: ubuntu-latest
+    needs: [clippy, test, check-format]
+    steps:
+      - name: Mark the job as successful
+        run: exit 0

readme.md

@@ -1,4 +1,7 @@
 # `serde_flat_path`
+[![build_status](https://github.com/jmeggitt/serde_flat_path/actions/workflows/ci.yml/badge.svg)](https://github.com/jmeggitt/serde_flat_path/actions)
+[![crates.io](https://img.shields.io/crates/v/serde_flat_path.svg)](https://crates.io/crates/serde_flat_path)
+
 This crate was designed to solve the problem of needing to manually create placeholder structs or untyped values (such
 as `serde_json::Value`). For example, take this json file:
 ```json