feat: Create initial bash-based action

.ecrc

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+{
+  "Verbose": false,
+  "Debug": false,
+  "IgnoreDefaults": false,
+  "SpacesAftertabs": false,
+  "NoColor": false,
+  "exclude": ["testfiles"],
+  "AllowedContentTypes": [],
+  "PassedFiles": [],
+  "Disable": {
+    "EndOfLine": false,
+    "Indentation": false,
+    "InsertFinalNewline": false,
+    "TrimTrailingWhitespace": false,
+    "IndentSize": false,
+    "MaxLineLength": false
+  }
+}

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = crlf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+curly_bracket_next_line = false
+spaces_around_operators = false
+spaces_around_brackets = both
+
+[*.md]
+trim_trailing_whitespace = false
+indent_size = 2
+
+[*{.yml,.ecrc,.nix}]
+indent_size = 2

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

LICENSE.md

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+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>

README.md

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+# setup-editorconfig-checker
+
+This action downloads [editorconfig-checker](https://github.com/editorconfig-checker/editorconfig-checker) by version number and adds it to your path, enabling you to check if your files consider your .editorconfig-rules, regardless of filetype.
+
+# Usage
+
+See [action.yml](action.yml)
+
+Basic:
+
+```yaml
+steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Install editorconfig-checker
+    - uses: kasperhesthaven/editorconfig-checker@v1
+      with:
+          version: "2.1.0" # Defaults to latest if not set
+
+    - name: Lint
+    - run: editorconfig-checker
+```

action.yml

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+name: "Setup editorconfig-checker"
+description: "Downloads the editorconfig-checker binary by version number and adds it to your PATH"
+author: "Kasper Hesthaven"
+branding:
+  icon: play
+  color: green
+inputs:
+  version:
+    description: "Version to download, e.g., 2.1.0 or 2.0.4. (default: latest)"
+    required: false
+  command-name:
+    description: "Set editorconfig-checker command name, e.g., 'ec'. (default: editorconfig-checker)"
+    required: false
+    default: "editorconfig-checker"
+runs:
+  using: "composite"
+  steps:
+    - name: Assign latest version if version not provided
+      run: |
+        if [ -z ${{ inputs.version }} ]; then
+            echo "::set-env name=VERSION::$(curl --silent "https://api.github.com/repos/editorconfig-checker/editorconfig-checker/releases/latest" | jq -r .tag_name)"
+        else
+            echo "::set-env name=VERSION::${{ inputs.version }}"
+        fi
+      shell: bash
+
+    - name: Assign lowercase runner env
+      run: |
+        echo "::set-env name=OS::$(uname -s | tr '[:upper:]' '[:lower:]')"
+        echo "::set-env name=ARCH::amd64"
+      shell: bash
+
+    - name: Download & add to path as editorconfig-checker
+      run: |
+        mkdir /home/runner/editorconfig-checker & cd "$_"
+        echo "Downloading editorconfig-checker version $VERSION for $OS-$ARCH from https://github.com/editorconfig-checker/editorconfig-checker/releases/download/$VERSION/ec-$OS-$ARCH.tar.gz"
+        curl -L https://github.com/editorconfig-checker/editorconfig-checker/releases/download/$VERSION/ec-$OS-$ARCH.tar.gz | tar zx --strip-components 1
+        mv ec-$OS-$ARCH ${{ inputs.command-name }}
+        echo "Adding editorconfig-checker to path as ${{ inputs.command-name }}"
+        echo "::add-path::$(pwd)"
+      shell: bash