add file browser component and widget

examples/file_browser_demo/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "file_browser_demo"
+version = "0.1.0"
+edition = "2021"
+
+# Make this package independent from the parent workspace
+[workspace]
+
+[dependencies]
+framework = { path = "../.." }
+yew = { version = "0.21", features = ["csr"] }
+yew-router = "0.18"
+wasm-bindgen = "0.2"
+web-sys = "0.3"
+js-sys = "0.3"
+wasm-bindgen-futures = "0.4"
+gloo = "0.11"
+console_error_panic_hook = "0.1"
+wee_alloc = "0.4"
+
+[dependencies.getrandom]
+version = "0.2"
+features = ["js"]
+
+[[bin]]
+name = "file_browser_demo"
+path = "src/main.rs"