Add .gitignore and .ratignore files for various directories

doc/licenses/d3-shape-3.2.0/LICENSE

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+Copyright 2010-2022 Mike Bostock
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.

doc/licenses/d3-shape-3.2.0/README

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+d3-path (https://github.com/d3/d3-shape)
+----------------------------------------------------------
+
+    Version: 3.2.0
+    From: 'Mike Bostock'
+    License(s):
+        BSD 0-clause (bundled/d3-shape-3.2.0/LICENSE)
+

doc/licenses/d3-shape-3.2.0/dep-coordinates.txt

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+d3-shape:3.2.0