feat(ci): introduce CI setup

Author: AndreiPashkin

.github/workflows/build.yml

@@ -0,0 +1,26 @@
+name: build
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+env:
+  CARGO_TERM_COLOR: always
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install Task
+      uses: arduino/setup-task@v2
+      with:
+        version: 3.x
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+    - name: Set up Rust toolchain
+      run: rustup update stable && rustup default stable
+    - name: Lint
+      run: task
+    - name: Build
+      run: cargo build --verbose
+    - name: Run tests
+      run: task test

README.md

@@ -1,13 +1,15 @@
+![Build](https://github.com/AndreiPashkin/compose-idents/actions/workflows/build.yml/badge.svg)
+
 # compose-idents
 
 A procedural macro that allows to construct identifiers from one or more arbitrary parts.
 
 ## Motivation
 
-Rust's declarative macros do not allow generating new identifiers, because they are designed to operate on 
-the syntactic level (as opposed to the lexical level) using simple pattern matching. 
+Rust's declarative macros do not allow generating new identifiers, because they are designed to operate on
+the syntactic level (as opposed to the lexical level) using simple pattern matching.
 
-For example the following code won't work: 
+For example the following code won't work:
 ```rust
 macro_rules! my_macro {
     ($name:ident) => {