Graphs: added near polygons distance-regular graphs

[gh-Ivo-Maffei]

Add functions to let graphs.distance_regular_graph construct near polygon graphs.

[gh-Ivo-Maffei]

Last 10 new commits:

​ed501d3	fix another bug
​b94eb15	added antipodal and folded graph methods; most docstrings done
​804c4b1	fixed bug; finished docstrings/doctests
​20a2b68	Merge branch 30394 into drg pseudo partition
​4b12c23	added doctests; expanded folded graph to check antipodal; sketch antipodal implementations
​bd6466f	removed attepmts to antipodal_graph
​b549b0b	added placeholder antipodal_graph method; #30405 should change it
​f1f9aa4	fix docstring
​2ddc579	Merge branch 30394 into pseudo partition
​c64c5ec	added psuedo partition graphs

[gh-Ivo-Maffei]

Wait for all dependencies to be sorted out

[git]

Branch pushed to git repo; I updated commit sha1. Last 10 new commits:

​898fbee	added positions to HalfCube
​d9c9149	Merge branch 't/30509' into t/30337
​3449361	Merge branch 9.2.beta12 into t/30337
​b99474b	Merge branch 't/30337' into t/30343
​7d17b7d	removed blank lines
​717cf19	Merge branch 't/30343' into t/30356
​63c88c0	fix bug; avoid long computations on import
​0cfe6ec	Merge branch 't/30356' into t/30386
​a40aba1	Merge branch 't/30386' into t/30414
​5590e3e	fix typo

[dimpase]

what is the status here?

[gh-Ivo-Maffei]

There's something wrong with the branch. I'm fixing it

[gh-Ivo-Maffei]

Should be fixed now

---

Last 10 new commits:

​039c92e	added doctest to general function
​2e8fbf5	fix doctests
​dde9d1a	fix some long time that are too long
​e59515d	Merge branch '30312' into near polygons
​cd075c7	change long time to not tested
​5092924	Merge branch 't/30394' into t/30441
​f6d5cc0	Merge branch 't/30414' into t/30441
​13d9c5b	added long time flag
​deeb6f0	Merge branch 't/30414' into t/30441
​38b4496	fixed typos

[dimpase]

lgtm

[dimpase]

needs merge with #30414

[dimpase]

Last 10 new commits:

​54499c7	sketch general function with conditionals for drg module
​c5f0f3d	fixed most sporadic graphs; added some docstring; added method to graphs
​f675f2c	completed sporadic database; added more docstrings; added basic checks
​e4b1d59	fixed docstring and doctests
​9aa7d07	fixed existence checks without drg module
​4bba926	added doctests to _integersection_array_from_graph
​0a9a194	fix bug; avoid long computations on import - typo fixed
​f9bb39a	Merge branch 'public/graphs/30356' into public/graphs/30386
​bbb799f	Merge branch 'public/graphs/30386' into public/graphs/30414
​e615813	Merge branch 'public/graphs/30414' into public/graphs/30441

[slelievre]

In a follow-up ticket, maybe sort alphabetically?

Or add brief comment on merits of chosen enumeration order?

 cdef enum ClassicalParametersGraph:
     NonExisting = 0,
-    Johnson,
-    Hamming,
-    HalvedCube,
-    UnitaryDualPolar,
-    HermitianForms,
-    GeneralisedHexagon,
-    Grassmann,
-    OrthogonalDualPolar1,
-    SymplecticDualPolar,
-    OrthogonalDualPolar2,
-    UnitaryDualPolar1,
-    UnitaryDualPolar2,
-    Ustimenko,
-    BilinearForms,
-    AlternatingForms,
-    LieE77,
-    AffineE6
+    AffineE6,
+    AlternatingForms,
+    BilinearForms,
+    GeneralisedHexagon,
+    Grassmann,
+    HalvedCube,
+    Hamming,
+    HermitianForms,
+    Johnson,
+    LieE77,
+    OrthogonalDualPolar1,
+    OrthogonalDualPolar2,
+    SymplecticDualPolar,
+    UnitaryDualPolar,
+    UnitaryDualPolar1,
+    UnitaryDualPolar2,
+    Ustimenko