internals.md: add more internals documentation
internals.md: add more internals documentation

Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

seem-sky/mraa,Propanu/mraa,g-vidal/mraa,smileboywtu/mraa,spitfire88/mraa,pctj101/mraa,intel-iot-devkit/mraa,allela-roy/mraa,arfoll/mraa,alext-mkrs/mraa,KurtE/mraa,jontrulson/mraa,Jon-ICS/mraa,timrtoo/Intel,matt-auld/mraa,neuroidss/mraa,yongli3/mraa,jontrulson/mraa,Pillar1989/mraa,timrtoo/Intel,yoyojacky/mraa,petreeftime/mraa,g-vidal/mraa,noahchense/mraa,arunlee77/mraa,alex1818/mraa,SyrianSpock/mraa,yongli3/mraa,zBMNForks/mraa,w4ilun/mraa,stefan-andritoiu/mraa,Pillar1989/mraa,intel-iot-devkit/mraa,tripzero/mraa,yongli3/mraa,noahchense/mraa,Jon-ICS/mraa,allela-roy/mraa,sundw2014/mraa,nioinnovation/mraa,seem-sky/mraa,Hbrinj/mraa,Hbrinj/mraa,nioinnovation/mraa,seem-sky/mraa,neuroidss/mraa,matt-auld/mraa,neuberfran/mraa,arfoll/mraa,alexandru-elisei/mraa,whbruce/mraa,KurtE/mraa,ncrastanaren/mraa,malikabhi05/mraa,mircea/mraa,stefan-andritoiu/mraa,damcclos/mraa,whbruce/mraa,SyrianSpock/mraa,ncrastanaren/mraa,ncrastanaren/mraa,alext-mkrs/mraa,ncrastanaren/mraa,arfoll/mraa,Propanu/mraa,sundw2014/mraa,sergev/mraa,whbruce/mraa,anonymouse64/mraa,smileboywtu/mraa,nioinnovation/mraa,neuberfran/mraa,jontrulson/mraa,stefan-andritoiu/mraa,mircea/mraa,KurtE/mraa,pctj101/mraa,KurtE/mraa,arunlee77/mraa,neuberfran/mraa,alexandru-elisei/mraa,STANAPO/mraa,allela-roy/mraa,w4ilun/mraa,timrtoo/Intel,neuroidss/mraa,arfoll/mraa,w4ilun/mraa,sundw2014/mraa,intel-iot-devkit/mraa,sergev/mraa,alexandru-elisei/mraa,noahchense/mraa,tripzero/mraa,SyrianSpock/mraa,tripzero/mraa,Kiritoalex/mraa,anonymouse64/mraa,petreeftime/mraa,damcclos/mraa,malikabhi05/mraa,yoyojacky/mraa,seem-sky/mraa,ProfFan/mraa,spitfire88/mraa,arunlee77/mraa,alext-mkrs/mraa,jontrulson/mraa,neuberfran/mraa,sergev/mraa,Meirtz/mraa,pctj101/mraa,spitfire88/mraa,w4ilun/mraa,alex1818/mraa,neuberfran/mraa,malikabhi05/mraa,ProfFan/mraa,pctj101/mraa,ncrastanaren/mraa,jontrulson/mraa,alext-mkrs/mraa,stefan-andritoiu/mraa,noahchense/mraa,g-vidal/mraa,yongli3/mraa,mircea/mraa,damcclos/mraa,stefan-andritoiu/mraa-gpio-chardev,Hbrinj/mraa,stefan-andritoiu/mraa-gpio-chardev,Kiritoalex/mraa,andreivasiliu2211/mraa,noahchense/mraa,petreeftime/mraa,zBMNForks/mraa,sergev/mraa,intel-iot-devkit/mraa,andreivasiliu2211/mraa,KurtE/mraa,stefan-andritoiu/mraa-gpio-chardev,alexandru-elisei/mraa,Propanu/mraa,yongli3/mraa,yoyojacky/mraa,sundw2014/mraa,stefan-andritoiu/mraa-gpio-chardev,pctj101/mraa,stefan-andritoiu/mraa-gpio-chardev,Propanu/mraa,whbruce/mraa,arfoll/mraa,zBMNForks/mraa,smileboywtu/mraa,seem-sky/mraa,petreeftime/mraa,intel-iot-devkit/mraa,sergev/mraa,ProfFan/mraa,STANAPO/mraa,arunlee77/mraa,STANAPO/mraa,alexandru-elisei/mraa,g-vidal/mraa,Hbrinj/mraa,stefan-andritoiu/mraa,andreivasiliu2211/mraa,spitfire88/mraa,Propanu/mraa,alext-mkrs/mraa,malikabhi05/mraa,malikabhi05/mraa,matt-auld/mraa,sundw2014/mraa,g-vidal/mraa,Jon-ICS/mraa,andreivasiliu2211/mraa,Meirtz/mraa,anonymouse64/mraa,Pillar1989/mraa,alex1818/mraa,timrtoo/Intel,Meirtz/mraa,timrtoo/Intel,Kiritoalex/mraa,ProfFan/mraa