feat: extract reusable dev/CI tools from GRM into devx package

Port core modules (config, exceptions, i18n, api_clients, gitea_cli),
14 CI scripts, 6 dev tools, 5 molecule tools, CLI entry point, workflows,
Makefile, tests (784 tests, 100% coverage), and documentation from GRM.

The devx package is published to the Gitea PyPI registry and consumed
by GRM, infra, and other oblachno-oss projects as a pip dependency.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

pyproject.toml

@@ -0,0 +1,85 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "devx"
+dynamic = ["version"]
+description = "Reusable development and CI/CD tools for oblachno-oss projects"
+readme = "README.md"
+license = {text = "GPL-3.0"}
+requires-python = ">=3.12"
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
+]
+dependencies = [
+    "requests>=2.34.2",
+    "python-dotenv>=1.2.2",
+    "click>=8.4.1",
+]
+
+[project.scripts]
+devx = "devx.cli:cli"
+
+[tool.setuptools.dynamic]
+version = {attr = "devx.__version__"}
+
+[project.optional-dependencies]
+# Minimal deps for CI scripts that only need click/dotenv/requests
+ci = [
+    "pytest>=9.1.0",
+    "pytest-cov>=7.1.0",
+]
+# Lint and type-checking tools (quality job)
+lint = [
+    "ruff>=0.15.17",
+    "pyright>=1.1.410",
+    "bandit>=1.8.2",
+    "pip-audit>=2.10",
+    "pre-commit>=4.6.0",
+]
+# Molecule testing (optional — for projects with Ansible roles)
+molecule = [
+    "molecule>=26.4.0",
+    "molecule-docker>=2.1.0",
+    "ansible-lint>=26.4.0",
+    "ansible>=14.0.0",
+]
+# Full dev environment (local development)
+dev = [
+    "devx[ci,lint]",
+    "build>=1.3.0",
+    "twine>=6.2.0",
+]
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools.package-data]
+devx = ["translations.json"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+pythonpath = ["src"]
+addopts = "--cov=src/devx --cov-report=term-missing --cov-fail-under=100"
+markers = [
+    "integration: marks tests as integration tests (not counted in coverage)",
+]
+
+[tool.ruff]
+target-version = "py312"
+line-length = 120
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "W", "UP", "B", "C4", "SIM"]
+ignore = ["SIM117"]
+
+[tool.ruff.format]
+quote-style = "double"
+indent-style = "space"
+
+[tool.pyright]
+include = ["src"]
+pythonVersion = "3.12"
+strict = ["src/devx/config.py", "src/devx/exceptions.py", "src/devx/i18n.py", "src/devx/api_clients.py", "src/devx/gitea_cli.py"]