Move all crates into a crates directory (#1940)

crates/egui_demo_app/Cargo.toml

@@ -0,0 +1,72 @@
+[package]
+name = "egui_demo_app"
+version = "0.18.0"
+authors = ["Emil Ernerfeldt <emil.ernerfeldt@gmail.com>"]
+license = "MIT OR Apache-2.0"
+edition = "2021"
+rust-version = "1.61"
+publish = false
+default-run = "egui_demo_app"
+
+[package.metadata.docs.rs]
+all-features = true
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+
+[features]
+default = ["glow", "persistence"]
+
+http = ["ehttp", "image", "poll-promise", "egui_extras/image"]
+persistence = [
+    "eframe/persistence",
+    "egui/persistence",
+    "serde",
+]
+screen_reader = ["eframe/screen_reader"] # experimental
+serde = [
+    "dep:serde",
+    "egui_demo_lib/serde",
+    "egui_extras/serde",
+    "egui/serde",
+]
+syntax_highlighting = ["egui_demo_lib/syntax_highlighting"]
+
+glow = ["eframe/glow"]
+wgpu = ["eframe/wgpu", "bytemuck", "pollster", "dep:wgpu"]
+
+
+[dependencies]
+chrono = { version = "0.4", features = ["js-sys", "wasmbind"] }
+eframe = { version = "0.18.0", path = "../eframe", default-features = false }
+egui = { version = "0.18.0", path = "../egui", features = ["extra_debug_asserts"] }
+egui_demo_lib = { version = "0.18.0", path = "../egui_demo_lib", features = ["chrono"] }
+
+# Optional dependencies:
+
+bytemuck = { version = "1.7.1", optional = true }
+egui_extras = { version = "0.18.0", optional = true, path = "../egui_extras" }
+wgpu = { version = "0.13", optional = true, features = ["webgl"] }
+
+# feature "http":
+ehttp = { version = "0.2.0", optional = true }
+image = { version = "0.24", optional = true, default-features = false, features = [
+  "jpeg",
+  "png",
+] }
+poll-promise = { version = "0.1", optional = true, default-features = false }
+pollster = { version = "0.2.5", optional = true }
+
+# feature "persistence":
+serde = { version = "1", optional = true, features = ["derive"] }
+
+
+# native:
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+tracing-subscriber = "0.3"
+
+# web:
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+console_error_panic_hook = "0.1.6"
+tracing-wasm = "0.2"