add cargo library and namesit on nokhwa

.gitignore

@@ -0,0 +1,2 @@
+/target
+Cargo.lock

Cargo.toml

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+[package]
+name = "nokhwa"
+version = "0.1.0"
+authors = ["l1npengtul <l1npengtul@protonmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

README.md

@@ -1,4 +1,6 @@
 # nokhwa
 Nokhwa(녹화): Korean word meaning "to record".
 
+This crate is in **active development**! It is not functional yet!
+
 Cross Platform Rust Library for powerful Webcam Capture and Virtual Webcams

src/lib.rs

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+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}