Add Lint Workflow (#123)

### Motivation and Context
This PR adds a Lint Github workflow so that code style rules can be
enforced for PRs.

1. This forms a baseline workflow that can be used as a template for
future workflows that will be added.
2. It helps enforce code style rules. Currently it only checks
PyCodeStyle and PyFlakes. Others will be added in the future.
3. Contributes to automated testing
4. Does not fix any open issue.

### Description
Added Ruff as a dev dependency. Added Github workflow which runs Ruff.

---------

Co-authored-by: Aditya Gudimella <adgudime@microsoft.com>
Co-authored-by: Devis Lucato <dluc@users.noreply.github.com>

.github/workflows/lint.yml

@@ -0,0 +1,49 @@
+name: Lint
+on: push
+# concurrency:
+#   group: lint-${{ github.ref }}
+#   cancel-in-progress: true
+
+jobs:
+  ruff:
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.8"]
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - run: echo "/root/.local/bin" >> $GITHUB_PATH
+      - uses: actions/checkout@v3
+      - name: Install poetry
+        run: pipx install poetry
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: "poetry"
+          cache-dependency-path: "python/pyproject.toml"
+      - name: Install SemanticKernel
+        run: cd python && poetry install --no-ansi
+      - name: Run lint
+        run: cd python && poetry run ruff check .
+  black:
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.8"]
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - run: echo "/root/.local/bin" >> $GITHUB_PATH
+      - uses: actions/checkout@v3
+      - name: Install poetry
+        run: pipx install poetry
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: "poetry"
+          cache-dependency-path: "python/pyproject.toml"
+      - name: Install SemanticKernel
+        run: cd python && poetry install --no-ansi
+      - name: Run lint
+        run: cd python && poetry run black --check .

python/pyproject.toml

@@ -16,6 +16,7 @@ pre-commit = "^2.21.0"
 black = {version = "^23.1.0", allow-prereleases = true}
 ipykernel = "^6.21.1"
 pytest = "7.2.0"
+ruff = "^0.0.257"
 
 [tool.isort]
 profile = "black"

python/semantic_kernel/core_skills/text_memory_skill.py

@@ -9,7 +9,6 @@
 
 
 class TextMemorySkill:
-
     COLLECTION_PARAM = "collection"
     RELEVANCE_PARAM = "relevance"
     KEY_PARAM = "key"