Merge branch 'doc/copy-btn-for-codeblocks' into 'master'

docs: Add copybutton to code blocks

See merge request espressif/esp-idf!9960

Author: krzychb

docs/conf_common.py

@@ -46,6 +46,7 @@
 extensions = ['breathe',
 
               'sphinx.ext.todo',
+              'sphinx_copybutton',
               'sphinx_idf_theme',
               'sphinxcontrib.blockdiag',
               'sphinxcontrib.seqdiag',