Remove $, >>> and other prompt prefixes when code copied from the… (#3884)

Adding configurations for sphinx-copybutton in conf.py
https://sphinx-copybutton.readthedocs.io/en/latest/use.html#using-regexp-prompt-identifiers

docs/conf.py

@@ -210,6 +210,13 @@ def make_pypi_svg(version: str) -> None:
 
 autodoc_member_order = "bysource"
 
+#  -- sphinx-copybutton configuration ----------------------------------------
+copybutton_prompt_text = (
+    r">>> |\.\.\. |> |\$ |\# | In \[\d*\]: | {2,5}\.\.\.: | {5,8}: "
+)
+copybutton_prompt_is_regexp = True
+copybutton_remove_prompts = True
+
 # -- Options for intersphinx extension ---------------------------------------
 
 # Example configuration for intersphinx: refer to the Python standard library.