add notebook about generating STAC metadata

[hrodmn]

This is pull request 3/6 for the FedGeoDay Workshop:

1. add workshop notebooks #1
2. add notebook for working with pgstac #2
3. add notebook about generating STAC metadata #3
4. Add notebook about stac-fastapi-pgstac #4
5. write titiler-pgstac notebook #5
6. tipg notebook (TODO)

I want to show the various ways that you can generate STAC metadata (in Python).

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[gadomski]

Looks really nice -- honestly, the best-laid-out explanation of "why don't I just make this by hand?" for STAC that I've seen.

Just need to add some dependencies to get it to run:

diff --git a/pyproject.toml b/pyproject.toml
index a525515..6b700fe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,10 +5,15 @@ description = "materials for the eoAPI workshop at FedGeoDay 2025"
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [
+    "boto3>=1.37.37",
     "httpx>=0.28.1",
     "pypgstac==0.9.6",
     "pystac>=1.12.2",
     "pystac-client>=0.8.6",
+    "rasterio>=1.4.3",
+    "rio-stac>=0.10.1",
+    "shapely>=2.1.0",
+    "stactools-sentinel2>=0.6.5",
 ]
 
 [dependency-groups]

[hrodmn]

Thanks for the review @gadomski!

Just need to add some dependencies to get it to run

Sorry about not being clear. I initially set this up with the pyproject.toml only but realized that I need to use a conda environment to make it play nice with the binder notebook server so I switched to using that for running the notebooks but did not remove the redundant dependencies section from pyproject.toml.

Conda, not pyproject.toml