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/common/AutoComplete.tsx

@@ -384,7 +384,7 @@ export default function AutoComplete({ detached, state, setState, onClick }: Pic
                                 })
                             }
                             onClick={onClick}>
-                            <Emoji emoji={(emojiDictionary as any)[match]} size={20} />
+                            <Emoji emoji={(emojiDictionary as Record<string, string>)[match]} size={20} />
                             :{match}:
                         </button>
                     ))}