Add update-lock command, add module name, and add dep for rules_cc

MODULE.bazel

@@ -0,0 +1,5 @@
+"""$REPO_NAME"""
+
+module(name = "$REPO_NAME")
+
+bazel_dep(name = "rules_cc", version = "0.0.9")

devenv.nix

@@ -17,6 +17,10 @@
     echo "Bazel version: $(bazel --version | cut -d ' ' -f 2)"
   '';
 
+  scripts.update-lock.exec = ''
+    bazel mod deps --lockfile_mode=update
+  '';
+
   scripts.build.exec = ''
     bazel build //main:$$NAME
   '';