Unify the naming convention Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
bitbucket.org/nuttx/nuttx/src/ replaced with github.com/apache/incubator-nuttx/blob/
- change Gnu to GNU - fix formatting and link fixes - add menuconfig screenshot - replaced config file edits with kconfig-tweak - fix section numbering - removed leftover todo in quickstart/index.rst - rewrote debugging section to use menuconfig
- with suggested edits from PR feedback
