Add Materials Science category under Science with description

Co-authored-by: Guillaume Fraux <[email protected]>

Author: TKanX

src/boot/categories.toml

@@ -569,6 +569,13 @@ macromolecular structure data, including PDB/mmCIF formats,
 biomolecular topologies, and assembly models.
 """
 
+[science.categories.materials]
+name = "Materials Science"
+description = """
+Crates for the study, characterization, and simulation of condensed matter
+and materials, including crystallography and solid-state physics.
+"""
+
 [science.categories.geo]
 name = "Geospatial"
 description = """