Improvements for GameVault's Offline-Cache and Storage

[Alfagun74]

Current Issues and Proposed Improvements:**

• Current cache structure breaks using multiple servers or multiple-profiles functionality.
  • [ ] Restructure stored data by client, so it allows for multiple profiles and servers. See below.
• No option to open the cache folder directly from the app.
  • [ ] Add an option to open the cache folder from the app.
• Cached Data/Configs by GameVault are not saved in a nice to look at & machine-readable format.
  • [ ] All data is saved in a human-readable format (json).
• Non-descriptive folder names (e.g., 'gbg') and unconventional image filenames.
  • [ ] Use descriptive names for files and folders
• Images lack proper file extensions and naming, making them unreadable.
  • [ ] Save images in a readable format with proper file extensions.
• Cache only gets written on download/installation so it gets outdated and shows wrong data.
  • [ ] Cache Library using a time-to-live index.

Proposed Data Structure

.
├── profiles.json                        # Contains profile information, app settings per profile and links users on a server to a specific profile
└── Servers                              # Contains numerical list of all servers this client has ever connected to
    ├── 1                                # Incremental ID
    │   ├── Games                        # Contains Metadata for each game on a server
    │   │   ├── 1                        # Serverside Game ID
    │   │   │   ├── background.png       # Clearly viewable background image
    │   │   │   ├── cover.png            # Clearly viewable cover image
    │   │   │   └── game.json            # Contains Game metadata and Time to Live
    │   │   ├── 2
    │   │   │   ├── background.png
    │   │   │   ├── cover.png
    │   │   │   └── game.json
    │   ├── server.json                  # Contains Server Metadata, like URL and so on
    │   └── Users                        # Contains Metadata for each user on a server
    │       ├── 1                        # Serverside User ID
    │       │   ├── avatar.png           # Clearly viewable avatar image
    │       │   ├── background.png       # Clearly viewable background image
    │       │   └── user.json            # Contains User metadata, like progresses, and information and a Time to Live
    │       ├── 2
    │       │   ├── avatar.png
    │       │   ├── background.png
    │       │   └── user.json
    └── 2
        ├── Games
        │   ├── 1
        │   │   ├── background.png
        │   │   ├── cover.png
        │   │   └── game.json
        │   ├── 2
        │   │   ├── background.png
        │   │   ├── cover.png
        │   │   └── game.json
        ├── server.json
        └── Users
            ├── 1
            │   ├── avatar.png
            │   ├── background.png
            │   └── user.json
            ├── 2
            │   ├── avatar.png                        
            │   └── user.json

Additional Information:

• Current system Screenshots:

[Alfagun74]

Needed for #339

[Alfagun74]

Probably needed for the full functionality of #447