add global toc

doc/toc.md

@@ -0,0 +1,41 @@
+# Full table of contents
+
+```{toctree}
+---
+maxdepth: 2
+---
+
+api-example.md
+api.md
+classifying-signatures.md
+command-line.md
+databases-advanced.md
+databases.md
+dev_plugins.md
+developer.md
+faq.md
+funding.md
+index.md
+kmers-and-minhash.ipynb
+legacy-databases.md
+more-info.md
+other-languages.md
+plotting-compare.ipynb
+publications.md
+release.md
+requirements.md
+sourmash-collections.ipynb
+sourmash-examples.ipynb
+sourmash-internals.md
+sourmash-sketch.md
+storage.md
+support.md
+tutorial-basic.md
+tutorial-lemonade.md
+tutorial-lin-taxonomy.md
+tutorial-long.md
+tutorials-lca.md
+tutorials.md
+using-LCA-database-API.ipynb
+using-sourmash-a-guide.md
+```