Add wealth data notebook, move in AlphaEarth.

Author: isaiahlg

.gitmodules

@@ -7,6 +7,3 @@
 [submodule "portfolio/mini-grid-nightlights"]
 	path = portfolio/mini-grid-nightlights
 	url = https://github.com/geohai/mini-grid-nightlights.git
-[submodule "portfolio/alphaearth"]
-	path = portfolio/alphaearth
-	url = https://github.com/isaiahlg/alphaearth.git

portfolio/aiforgood/boston-embeddings.png

@@ -9053,7 +9053,7 @@ <h2 id="Export-Notebook-to-HTML">Export Notebook to HTML<a class="anchor-link" h
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 <div class="highlight hl-ipython3"><pre><span></span><span class="c1"># supress warnings</span>
@@ -9082,7 +9082,7 @@ <h2 id="Export-Notebook-to-HTML">Export Notebook to HTML<a class="anchor-link" h
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