ci: add GitHub Actions test workflow

Run StyLua lint and plenary tests on push to main
and pull requests. Tests against Neovim 0.11.3,
0.11.4, and nightly on Ubuntu.

Author: seflue

.github/workflows/tests.yml

@@ -0,0 +1,43 @@
+name: tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+env:
+  CI: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: JohnnyMorganz/stylua-action@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          version: latest
+          args: --check lua/ spec/
+
+  tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+        version:
+          - v0.11.3
+          - v0.11.4
+          - nightly
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Neovim
+        uses: rhysd/action-setup-vim@v1
+        id: neovim
+        with:
+          neovim: true
+          version: ${{ matrix.version }}
+      - name: Run tests
+        run: make test

README.md

@@ -1,5 +1,7 @@
 # telescope-orgmode.nvim
 
+[![tests](https://github.com/nvim-orgmode/telescope-orgmode.nvim/actions/workflows/tests.yml/badge.svg)](https://github.com/nvim-orgmode/telescope-orgmode.nvim/actions/workflows/tests.yml)
+
 Fuzzy search, refile, and link insertion for [orgmode](https://github.com/nvim-orgmode/orgmode) with [telescope.nvim](https://github.com/nvim-telescope/telescope.nvim) or [snacks.nvim](https://github.com/folke/snacks.nvim) picker.
 
 ## Features

spec/integration/adapters/smoke_spec.lua

@@ -5,7 +5,7 @@ local helpers = require('spec.e2e.adapters.helpers')
 
 local has_snacks = pcall(require, 'snacks')
 
-describe('Adapter Smoke Tests', function()
+describe('[Integration: Adapter Smoke Tests]', function()
   after_each(function()
     helpers.close_all_pickers()
     helpers.close_all_buffers()