docs: Design template update (#1488)
docs: Design template update (#1488)

* populate template design section with explanations

* fix link

* review suggestions

* general improvements

* review improvements

* alter architecture section explanations

* fix anchors and contents

Co-authored-by: Illia Romanenko <e69cf06ab24ebbcbbc33673da820a07e7919e0b1@gmail.com>
Flank/flank-dashboard,Flank/flank-dashboard,Flank/flank-dashboard,Flank/flank-dashboard,Flank/flank-dashboard,Flank/flank-dashboard