Save reader settings per manga in Meta (#216)

* [#213] Add missing "meta" property

- IManga
- IMangaCard (optional)
- IChapter
- ICategory

* [#213] Add util functions for handling metadata

- global server
- manga
- chapter
- category

* [#213] Use "ReaderSettings" from the manga metadata

- get ReaderSettings from manga metadata
- remove unnecessary check "make sure settings has all the keys"
    in case the stored settings in the metadata are outdated they will be filled with default values

* [#213] Reload manga only in case "mangaId" changed

In case the chapter is still from the same manga, a reload is unnecessary

* [#213] Only update the changed reader setting

Otherwise the app has to send patch requests to the server for every setting even if it didn't change

* [#213] Hide "openButton" on first render in case "navBar" is shown

The "openButton" was always set to be visible event in case the navBar was shown on the first render

* [#213] Open the "ReaderNavBar" if needed after receiving new settings

Otherwise, the drawer won't open in case the "navBar" was hidden on the first render since the default state in that case was set to false

* [#213] Update "ReaderSettings" after receiving the manga response

Otherwise, the default settings aren't getting removed

* [#213] Hide/Show "OpenButton" when opening/closing the drawer

Otherwise, the button stays hidden until it gets updated due to scrolling

* [#213] Keep "ReaderNavBar" state when opening prev/next chapter

In case the navBar wasn't sticky but opened, it got closed when the prev/next chapter got opened

* [#213] Prevent "ReaderNavBar" from closing when changing "staticNav" setting

src/typings.d.ts

@@ -54,6 +54,22 @@ interface IState {
     index: number
 }
 
+interface IMetadata<VALUES extends AllowedMetadataValueTypes = string> {
+    [key: string]: VALUES;
+}
+
+interface IMetadataHolder<VALUES extends AllowedMetadataValueTypes = string> {
+    meta?: IMetadata<VALUES>
+}
+
+type AllowedMetadataValueTypes = string | boolean | number | undefined;
+
+type MangaMetadataKeys = keyof IReaderSettings;
+
+type AppMetadataKeys = MangaMetadataKeys;
+
+type MetadataKeyValuePair = [AppMetadataKeys, AllowedMetadataValueTypes];
+
 interface IMangaCard {
     id: number
     title: string
@@ -61,6 +77,7 @@ interface IMangaCard {
     unreadCount?: number
     downloadCount?: number
     inLibrary?: boolean
+    meta?: IMetadata
 }
 
 interface IManga {
@@ -80,8 +97,9 @@ interface IManga {
     inLibrary: boolean
     source: ISource
 
-    realUrl: string
+    meta: IMetadata
 
+    realUrl: string
     freshData: boolean
     unreadCount?: number
     downloadCount?: number
@@ -107,6 +125,7 @@ interface IChapter {
     chapterCount: number
     pageCount: number
     downloaded: boolean
+    meta: IAppMetadata
 }
 
 interface IMangaChapter {
@@ -126,6 +145,7 @@ interface ICategory {
     order: number
     name: string
     default: boolean
+    meta: IAppMetadata
 }
 
 interface INavbarOverride {