Updated egui to 0.33 and reorganized crates to have all versions in one place

[redjack96]

In this PR:

• egui 0.32 -> 0.33
• bevy_egui 0.37 -> 0.38
• All crate version numbers are now in the workspace Cargo.toml, and are automatically inherited by all members that use them
• All crate version numbers now follow the semver compatibility rules (note the "^"). This is to reduce the need to manually update them.
• Removed redundant version for local crates in all Cargo.toml. For example bevy_renet now does not specify anymore the version for renet, renet_netcode and renet_steam, and uses whatever version they have locally.
• Added default feature for demo_bevy (netcode) and updated its README.md

I cannot fix this check:

• paste is no longer mantained, but is used by metal, which is a ui cross-platform library used by wgpu and bevy. It is also used in the steamworks crate.

Warning:
error[unmaintained]: paste - no longer maintained
    ┌─ /github/workspace/Cargo.lock:317:1
    │
317 │ paste 1.0.15 registry+https://github.com/rust-lang/crates.io-index
    │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ unmaintained advisory detected
    │
    ├ ID: RUSTSEC-2024-0436
    ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2024-0436
    ├ The creator of the crate `paste` has stated in the [`README.md`](https://github.com/dtolnay/paste/blob/master/README.md) 
      that this project is not longer maintained as well as archived the repository
      
      ## Possible Alternative(s)
      
      - [pastey](https://crates.io/crates/pastey), a fork of paste and is aimed to be a drop-in replacement with additional features for paste crate
    ├ Announcement: https://github.com/dtolnay/paste
    ├ Solution: No safe upgrade is available!
    ├ paste v1.0.15
      ├── metal v0.32.0
      │   └── wgpu-hal v26.0.6
      │       ├── wgpu v26.0.1
      │       │   └── bevy_render v0.17.3
      │       │       ├── bevy_core_pipeline v0.17.3
      │       │       │   ├── bevy_egui v0.38.0
      │       │       │   │   └── demo_bevy v0.1.0
      │       │       │   ├── bevy_internal v0.17.3
      │       │       │   │   └── bevy v0.17.3
      │       │       │   │       ├── (dev) bevy_renet v3.0.0
      │       │       │   │       │   └── demo_bevy v0.1.0 (*)
      │       │       │   │       └── demo_bevy v0.1.0 (*)
      │       │       │   ├── bevy_pbr v0.17.3
      │       │       │   │   └── bevy_internal v0.17.3 (*)
      │       │       │   ├── bevy_sprite_render v0.17.3
      │       │       │   │   └── bevy_ui_render v0.17.3
      │       │       │   │       └── bevy_egui v0.38.0 (*)
      │       │       │   └── bevy_ui_render v0.17.3 (*)
      │       │       ├── bevy_egui v0.38.0 (*)
      │       │       ├── bevy_internal v0.17.3 (*)
      │       │       ├── bevy_pbr v0.17.3 (*)
      │       │       ├── bevy_sprite_render v0.17.3 (*)
      │       │       └── bevy_ui_render v0.17.3 (*)
      │       ├── wgpu-core v26.0.1
      │       │   └── wgpu v26.0.1 (*)
      │       ├── wgpu-core-deps-apple v26.0.0
      │       │   └── wgpu-core v26.0.1 (*)
      │       └── wgpu-core-deps-windows-linux-android v26.0.0
      │           └── wgpu-core v26.0.1 (*)
      └── steamworks v0.12.2
          ├── demo_bevy v0.1.0 (*)
          └── renet_steam v2.1.0
              └── bevy_renet v3.0.0 (*)

advisories FAILED, bans ok, licenses ok, sources ok