Add method to ED1d for calculating membrane resistance as a function of ion concentration #8961

Job	Run time
Check code is formatted (Black)	21s
Code linting (pylint)	4m 23s
macOS setup (EXPERIMENTAL) (3.9)	1h 3m 12s
Test notebooks (py3.9/linux)	5m 14s
Tests (py3.9/linux)	55m 28s
Test notebooks (py3.9/win64)	11m 29s
Tests (py3.9/win64)	1h 14m 0s
Test notebooks (py3.11/linux)	6m 3s
pytest (user mode) (py3.9/linux)	39m 15s
Tests (py3.10/linux)	48m 14s
Test notebooks (py3.11/win64)	13m 52s
pytest (user mode) (py3.9/win64)	37m 48s
Tests (py3.10/win64)	1h 28m 49s
pytest (user mode) (py3.11/linux)	27m 49s
Tests (py3.11/linux)	48m 41s
pytest (user mode) (py3.11/win64)	43m 51s
Tests (py3.11/win64)	1h 32m 11s
Upload coverage report (Codecov)	16s
	11h 0m 56s

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