numpy>=2.4.0 incompatability. TypeError: only 0-dimensional arrays can be converted to Python scalars

[maartenboersma]

Describe the bug
With numpy versions >= 2.4.0, cannot compile any SRAM because of the python exception above.

Version
tag=1.2.48

To Reproduce
Try to compile an SRAM with numpy>=2.4.0. I confirmed that things work with numpy<=2.3.5.

Expected behavior
As specified in requirements.txt, I expect that OpenRAM works with any numpy>=1.17.4.

Logs
Stack trace:

  File "/my/path/OpenRAM/compiler/sram.py", line 58, in __init__
    self.s.create_layout()
  File "/my/path/OpenRAM/compiler/modules/sram_1bank.py", line 217, in create_layout
    self.route_layout()
  File "/my/path/OpenRAM/compiler/modules/sram_1bank.py", line 1072, in route_layout
    init_bbox = self.get_bbox()
                ^^^^^^^^^^^^^^^
  File "/my/path/OpenRAM/compiler/base/hierarchy_layout.py", line 1820, in get_bbox
    ll = vector(boundary[0][0], boundary[0][1])
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/my/path/OpenRAM/compiler/base/vector.py", line 29, in __init__
    self.x = float(x)
             ^^^^^^^^
TypeError: only 0-dimensional arrays can be converted to Python scalars

I think the fix is trivial enough for me to do it. I plan to create a PR for it.