Demo_User_Guides: Update EdgeAI Gallery User-Guide

[cshilwant]

fix(Demo_User_Guides): Fix instructions for building EdgeAI GUI App

* fix Compiling EdgeAI GUI App section to drop references of
ti-apps-launcher & instead use edgeai-gui-app.
Also, drop RT_BUILD flag which is not applicable for
EdgeAI GUI App.

* Fixes 7706ef6fed676764074ea0f209fe6ca3480ddfc1

Signed-off-by: Chirag Shilwant <[email protected]>

---

fix(Edge_AI_Gallery_User_Guide): Handle miscellaneous fixes w.r.t sphinx

* This commit handles following fixes related to sphinx,

  - Switch to role-file [0]
  - Add 1 new line between the content & note directive as per [1]
  - Switch to code directive [2]

[0] - https://www.sphinx-doc.org/en/master/usage/restructuredtext/roles.html#role-file

[1] - https://github.com/TexasInstruments/processor-sdk-doc/blob/master/CONTRIBUTING.md#indentation-and-whitespace

[2] - https://www.sphinx-doc.org/en/master/usage/restructuredtext/directives.html#directive-code

Signed-off-by: Chirag Shilwant <[email protected]>

[cshilwant]

Preview available at https://cshilwant.github.io/processor-sdk-doc/processor-sdk-linux-AM62AX/esd/docs/master/linux/Demo_User_Guides/Edge_AI_Gallery_User_Guide.html

[github-actions]

New warnings found with rstcheck:

source/linux/Demo_User_Guides/Edge_AI_Gallery_User_Guide.rst:5: (INFO/1) Enumerated list start value not ordinal-1: "2" (ordinal 2)
source/linux/Demo_User_Guides/Edge_AI_Gallery_User_Guide.rst:5: (INFO/1) Enumerated list start value not ordinal-1: "3" (ordinal 3)
source/linux/Demo_User_Guides/Edge_AI_Gallery_User_Guide.rst:5: (INFO/1) Enumerated list start value not ordinal-1: "5" (ordinal 5)
source/linux/Demo_User_Guides/Edge_AI_Gallery_User_Guide.rst:5: (INFO/1) Enumerated list start value not ordinal-1: "6" (ordinal 6)
source/linux/Demo_User_Guides/Edge_AI_Gallery_User_Guide.rst:5: (INFO/1) Enumerated list start value not ordinal-1: "9" (ordinal 9)

[sadik-smd]

Vale has dropped a couple of warnings, those can be addressed.