feat: add bt.ingest() and manifoldbt CLI for data ingestion

- Add ingest() function for downloading bar data from providers
- Add manifoldbt CLI entry point (manifoldbt ingest ...)
- Supported providers: binance, hyperliquid (free), databento, massive (Pro)
- Update type stubs for py_ingest

pyproject.toml

@@ -9,7 +9,6 @@ classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Financial and Insurance Industry",
     "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
     "Programming Language :: Rust",
     "Topic :: Office/Business :: Financial :: Investment",
@@ -24,6 +23,9 @@ plotly = ["plotly>=5.0"]
 all = ["matplotlib>=3.7", "plotly>=5.0", "pandas>=1.5", "polars>=0.20"]
 dev = ["pytest>=7.0", "polars>=0.20", "pandas>=1.5", "pyarrow>=14.0", "matplotlib>=3.7"]
 
+[project.scripts]
+manifoldbt = "manifoldbt.cli:main"
+
 [project.urls]
 Homepage = "https://manifold-bt.com"
 Repository = "https://github.com/manifoldbt/manifoldbt"