Enable generation of PDF document

[cshilwant]

The current implementation of processor-sdk-doc uses reStructuredText (reST or RST) for generating standard HTML from the given source files and configs.

Ask is to enable something like https://pypi.org/project/rst2pdf/ which can integrated in existing sphinx build flow to generate PDF.

[StaticRocket]

This is dependent on the removal of all relative HTML inter-document linking.

source/system/Demo_User_Guides/TI_Apps_Launcher_User_Guide.rst
source/system/Demo_User_Guides/Servo_Drive_Demo_User_Guide.rst
source/android/Overview_Flashing.rst
source/android/Overview_Building_the_SDK.rst
source/common/PRU-ICSS/PRU-Hands-on-Labs.rst
source/common/PRU-ICSS/Overview.rst
source/linux/Foundational_Components_IPC_J784S4.rst
source/linux/Foundational_Components_IPC_J742S2.rst
source/devices/J7_Family/linux/_Release_Specific_Migration_Guide.rst
source/linux/Foundational_Components_IPC_J722S.rst
source/linux/Foundational_Components_IPC62ax.rst
source/linux/Foundational_Components_IPC_J721S2.rst
source/linux/Foundational_Components_IPC_J721E.rst
source/linux/Foundational_Components_IPC_J7200.rst
source/devices/AM62X/linux/Release_Specific_Migration_Guide.rst
source/devices/AM62X/linux/Overview/Build_and_Run_the_Demos.rst
source/devices/AM437X/linux/Release_Specific_Migration_Guide.rst
source/linux/Foundational_Components/U-Boot/UG-General-Info.rst
source/linux/Foundational_Components/U-Boot/UG-UFS.rst
source/linux/Release_Specific/_CoreSDK_Linux_Migration_Guide.rst
source/linux/Foundational_Components/Tools/SysConfig_Tools.rst
source/devices/AM335X/linux/Release_Specific_Migration_Guide.rst
source/linux/How_to_Guides/Target/How_to_use_a_Mouse_instead_of_the_Touchscreen_with_Matrix.rst
source/linux/Foundational_Components/U-Boot/UG-NAND.rst
source/linux/Foundational_Components/Tools/Pin_Mux_Tools.rst
source/linux/How_to_Guides/Target/How_to_enable_display_sharing_between_remotecore_and_Linux.rst
source/linux/How_to_Guides/Target/How_to_Recalibrate_the_Touchscreen.rst
source/linux/Foundational_Components/Tools/Flash_Tools/_Sitara_Uniflash.rst
source/linux/How_to_Guides/Target/How_to_Program_Beaglebone_Black_eMMC_via_SD_Card.rst
source/linux/Foundational_Components/Tools/Flash_Tools/_AM335x_Flash.rst
source/linux/How_to_Guides/Target/How_to_Boot_Beagle_Bone_Black_with_Processor_SDK_Linux.rst
source/devices/AM62AX/linux/Release_Specific_Migration_Guide.rst
source/linux/Foundational_Components/PRU-ICSS/Linux_Drivers/PRU-ICSS_Ethernet.rst
source/devices/AM64X/linux/Release_Specific_Migration_Guide.rst
source/linux/Foundational_Components/Tools/Code_Composer_Studio/_Remote_Explorer_Setup_with_CCS.rst
source/devices/AM62PX/linux/Overview/Build_and_Run_the_Demos.rst
source/linux/Overview/Program_EVM.rst
source/linux/Foundational_Components/Tools/Code_Composer_Studio/_GDB_Setup_with_CCS.rst
source/linux/Foundational_Components/Tools/Code_Composer_Studio/_CCS_Installation.rst
source/linux/Foundational_Components/Tools/Code_Composer_Studio/_CCS_Compiling.rst
source/linux/Overview/Processor_SDK_Linux_Getting_Started_Guide.rst
source/devices/AM62AX/linux/Overview/Build_and_Run_the_Demos.rst
source/devices/AM64X/linux/Overview/Build_and_Run_the_Demos.rst
source/linux/Foundational_Components/Machine_Learning/tidl.rst
source/linux/How_to_Guides/Host/Program_the_eMMC_on_Beaglebone_Black.rst
source/linux/Foundational_Components/Machine_Learning/tflite.rst
source/linux/How_to_Guides/FAQ/How_to_Verify_Ipc_Linux_R5.rst
source/devices/AM64X/index.rst
source/linux/How_to_Guides/Board_Port/U-Boot.rst
source/linux/How_to_Guides/FAQ/How_to_Integrate_Open_Source_Software.rst
source/linux/How_to_Guides/Board_Port/Linux.rst
source/linux/How_to_Guides/Host/Additional_How_to_Guide_Links.rst
source/linux/How_to_Guides/Host/AM335x_AM437x_Hardware_Migration_Guide.rst
source/linux/Foundational_Components/Kernel/Kernel_Drivers/E5010_JPEG_Encoder.rst
source/linux/Foundational_Components/Kernel/Kernel_Drivers/Audio.rst
source/linux/Foundational_Components/Kernel/Kernel_Drivers/Display/DSS7.rst