sagemathgh-37858: sage.features.topcom

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- Part of sagemath#35856

We also change how the SPKG index in the reference manual is generated.
`index.rst` is now a static file that uses `.. include` directives to
read in generated files `index_standard.rst`, `index_optional.rst`, etc.

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URL: sagemath#37858
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee

build/pkgs/configure/checksums.ini

@@ -1,3 +1,3 @@
 tarball=configure-VERSION.tar.gz
-sha1=f3e560bbf33add8504ba9f7ba93fff9e82e3e445
-sha256=bef93be1bb978fa34cd5aaa9c041d1a97a33ff35f88c9df2f9c25e6764770c56
+sha1=5fd1dda8d34776660c54a229ed22dcc3ed472322
+sha256=38d67833b5c6b3f52cf8ed08a290a261269a37e9abad8446112a49712084e1ce

build/pkgs/configure/package-version.txt

@@ -1 +1 @@
-5c12765f7e585b58ab0cd99f7998cfa615f85247
+9197bf00f98b49c2d1e00139cb5166c5d58caaf3