meta: add cargo command aliases

Author: calebcartwright

.cargo/config

@@ -0,0 +1,18 @@
+[alias]
+t = "test-all"
+ta = "test-all"
+test-all = "test --manifest-path rustfmt-core/Cargo.toml"
+
+test-bin = "test --manifest-path rustfmt-core/rustfmt-bin/Cargo.toml"
+tb = "test-bin"
+
+test-config = "test --manifest-path rustfmt-core/rustfmt-config/Cargo.toml"
+tc = "test-config"
+
+test-emitter = "test --manifest-path rustfmt-core/rustfmt-emitter/Cargo.toml"
+te = "test-emitter"
+
+test-lib = "test --manifest-path rustfmt-core/rustfmt-lib/Cargo.toml"
+tl = "test-lib"
+
+i = "install --path . --force --locked"