Rewrite

This is a full rewrite of this package including the following features/changes:
* ext-uv adapter
* child process adapter
* fallback (blocking) adapter (for native Windows)
* simplified the internals to remove unnecessary complexity
* file_get_contents/file_put_contents like API to read/write from/to files
* start has become an object instead of an array

This PR doesn't include the following features/changes as those will be added in with followup PR's:
* ext-eio adapter
* macos support
* mode support to define permissions when creating files/directories
* symlinks read/creating/deleting
* deleting of directories

.github/workflows/ci.yml

@@ -0,0 +1,51 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  PHPUnit:
+    name: PHPUnit (PHP ${{ matrix.php }} with ${{ matrix.extensions }} on ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+        php:
+          - "8.1"
+          - "8.0"
+          - "7.4"
+        extensions:
+          - ""
+          - "uv-amphp/ext-uv@master"
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install libuv
+        if: matrix.os == 'ubuntu-latest'
+        run: sudo apt-get install libuv1-dev
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: pcov
+          extensions: ${{ matrix.extensions }}
+      - run: composer install
+      - run: vendor/bin/phpunit --coverage-text --debug
+  PHPUnit-Docker:
+    name: PHPUnit (PHP ${{ matrix.php }} on Docker)
+    runs-on: ubuntu-latest
+    container:
+      image: wyrihaximusnet/php:${{ matrix.php }}-nts-alpine-slim-dev-root
+    strategy:
+      fail-fast: false
+      matrix:
+        php:
+          - "8.1"
+          - "8.0"
+          - "7.4"
+    steps:
+      - uses: actions/checkout@v2
+      - run: composer install
+      - run: vendor/bin/phpunit --coverage-text

.gitignore

@@ -1 +1,2 @@
 vendor
+.phpunit.result.cache