updated gitignore and setup PKGBUILD for archlinux packaging

PKGBUILD

@@ -0,0 +1,26 @@
+pkgname=worldcoder
+pkgver=0.1.0
+pkgrel=1
+makedepends=('rust' 'cargo')
+arch=('i686' 'x86_64' 'armv6h' 'armv7h')
+
+# Generated in accordance to https://wiki.archlinux.org/title/Rust_package_guidelines.
+# Might require further modification depending on the package involved.
+prepare() {
+  cargo fetch --locked --target "$CARCH-unknown-linux-gnu"
+}
+
+build() {
+  export RUSTUP_TOOLCHAIN=stable
+  export CARGO_TARGET_DIR=target
+  cargo build --frozen --release --all-features
+}
+
+check() {
+  export RUSTUP_TOOLCHAIN=stable
+  cargo test --frozen --all-features
+}
+
+package() {
+  install -Dm0755 -t "$pkgdir/usr/bin/" "target/release/$pkgname"
+}