add cviruntime

commit 3f4938648950a7f3bf9a19c320ca9fae7c52de20
Author: sophgo-forum-service <forum_service@sophgo.com>
Date:   Mon May 13 13:44:23 2024 +0800

    [feat] cviruntime opensource for cv18xx soc.

    - a4b6a3, add cumsum and gatherelements_pt.

cviruntime/python/cvk_test.py

@@ -0,0 +1,16 @@
+import numpy as np
+import pyruntime as rt
+cvk_ctx = rt.CvkContext("CviContext")
+a = np.array([[[[1]]]], dtype=np.int8)
+b = cvk_ctx.lmem_alloc_tensor(a, 1)
+b.shapes()
+b.address()
+c = cvk_ctx.lmem_alloc_tensor(a, 1)
+c.shapes()
+c.address()
+
+cvk_ctx.tdma_g2l_tensor_copy(b, a)
+d = np.array([[[[0]]]], dtype=np.int8)
+cvk_ctx.tdma_l2g_tensor_copy(d, b)
+
+print(a == d)