Rename to stealergram, add pyproject.toml, purge em-dashes

- Rename project to stealergram throughout
- Add pyproject.toml (replaces requirements.txt split, folds pytest.ini)
- Replace all em-dashes with hyphens across all source files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,46 @@
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.backends.legacy:build"
+
+[project]
+name = "stealergram"
+version = "0.1.0"
+description = "Telegram channel monitor - downloads, extracts, scores, and alerts on credential leaks"
+requires-python = ">=3.11"
+dependencies = [
+    # Telegram
+    "telethon",
+    "tgcrypto",
+    # TUI
+    "textual",
+    # Config
+    "python-dotenv",
+    # Progress bars (CLI mode)
+    "tqdm",
+    # Archive extraction
+    "py7zr",
+    "rarfile",
+]
+
+[project.optional-dependencies]
+web = [
+    "fastapi",
+    "uvicorn[standard]",
+    "jinja2",
+    "python-multipart",
+    "bcrypt",
+    "python-jose[cryptography]",
+]
+dev = [
+    "pytest",
+]
+
+[project.scripts]
+stealergram = "main:main"
+
+[tool.setuptools.packages.find]
+where = ["."]
+exclude = ["tests*", "data*", "logs*", "tmp*"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]