Include entire sam3 package instead of just sam3 and sam3.model (#327)

Summary:
there are several imports within the `sam3.model` package that reference other packages within `sam3` other than `sam3` and `sam3.model` (for example [here](https://github.com/facebookresearch/sam3/blob/main/sam3/model/sam3_tracker_base.py#L15)).  This fixes the package structure so that you can `pip install` the package and `import sam3`

Pull Request resolved: https://github.com/facebookresearch/sam3/pull/327

Reviewed By: haithamkhedr

Differential Revision: D88950127

Pulled By: lematt1991

fbshipit-source-id: 3554512d304ccdf679a9af8606bbfe1f7f2a1cfb

pyproject.toml

@@ -82,8 +82,12 @@ train = [
 "Homepage" = "https://github.com/facebookresearch/sam3"
 "Bug Tracker" = "https://github.com/facebookresearch/sam3/issues"
 
-[tool.setuptools]
-packages = ["sam3", "sam3.model"]
+[tool.setuptools.packages.find]
+include = ["sam3*"]
+exclude = ["build*", "scripts*", "examples*"]
+
+[tool.setuptools.package-data]
+sam3 = ["assets/*.txt.gz"]
 
 [tool.setuptools.dynamic]
 version = {attr = "sam3.__version__"}