remove most uses of as any in typescript

- replaced many uses of `as any` with another more specific cast `as T`
- filled in missing typed for items that needed to be typed
  - new runtime code was added where necessary to satisfy the new types with comments
- added missing theme variable "sidebar-active" to the Theme variables
- forms using `react-hook-form` are now typechecked
- changed some instances of `target` into `currentTarget` while removing `as any` assertions

src/components/navigation/left/HomeSidebar.tsx

@@ -107,11 +107,8 @@ function HomeSidebar(props: Props) {
                 )}
                 <Localizer>
                     <Category
-                        text={
-                            (
-                                <Text id="app.main.categories.conversations" />
-                            ) as any
-                        }
+                        text={<Text id="app.main.categories.conversations" />}
+                        /** @ts-ignore : ignored due to conflicting naming between the Category property name and the existing JSX attribute */
                         action={() => openScreen({ id: "special_input", type: "create_group" })}
                     />
                 </Localizer>