add linter, editorconfig and pre-commit hooks

.editorconfig

@@ -0,0 +1,26 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.py]
+indent_style = space
+indent_size = 4
+max_line_length = 88
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+[*.{json,js,ts}]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[Makefile]
+indent_style = tab

.pre-commit-config.yaml

@@ -0,0 +1,40 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+      - id: check-merge-conflict
+      - id: check-toml
+      - id: mixed-line-ending
+        args: ['--fix=lf']
+      - id: check-case-conflict
+
+  - repo: https://github.com/psf/black
+    rev: 23.7.0
+    hooks:
+      - id: black
+        language_version: python3
+        args: [--line-length=88]
+
+  - repo: https://github.com/pycqa/isort
+    rev: 5.12.0
+    hooks:
+      - id: isort
+        args: [--profile=black, --line-length=88]
+
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.1.6
+    hooks:
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix]
+      - id: ruff-format
+
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v1.5.1
+    hooks:
+      - id: mypy
+        additional_dependencies: [types-requests]
+        exclude: ^(tests/|examples/)

lint.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+"""
+Lint runner script for pytrickle project.
+Runs all configured linting tools with proper 4-space indentation and POSIX line endings.
+"""
+
+import subprocess
+import sys
+from pathlib import Path
+
+
+def run_command(cmd: list[str], description: str) -> bool:
+    """Run a command and return True if successful."""
+    print(f"\n🔍 Running {description}...")
+    try:
+        result = subprocess.run(cmd, check=True, capture_output=True, text=True)
+        print(f"✅ {description} passed")
+        if result.stdout:
+            print(result.stdout)
+        return True
+    except subprocess.CalledProcessError as e:
+        print(f"❌ {description} failed")
+        if e.stdout:
+            print("STDOUT:", e.stdout)
+        if e.stderr:
+            print("STDERR:", e.stderr)
+        return False
+
+
+def main():
+    """Run all linting tools."""
+    project_root = Path(__file__).parent
+    python_files = ["pytrickle", "tests", "examples"]
+
+    # Change to project root
+    import os
+    os.chdir(project_root)
+
+    success = True
+
+    # Run Black formatter
+    success &= run_command(
+        ["black", "--check", "--diff"] + python_files,
+        "Black code formatting check"
+    )
+
+    # Run isort import sorting
+    success &= run_command(
+        ["isort", "--check-only", "--diff"] + python_files,
+        "isort import sorting check"
+    )
+
+    # Run Ruff linter
+    success &= run_command(
+        ["ruff", "check"] + python_files,
+        "Ruff linting"
+    )
+
+    # Run Ruff formatter
+    success &= run_command(
+        ["ruff", "format", "--check"] + python_files,
+        "Ruff formatting check"
+    )
+
+    # Run MyPy type checking
+    success &= run_command(
+        ["mypy"] + python_files,
+        "MyPy type checking"
+    )
+
+    if success:
+        print("\n🎉 All linting checks passed!")
+        return 0
+    else:
+        print("\n💥 Some linting checks failed!")
+        return 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())