Add Bazel build files.

.bazelrc

@@ -0,0 +1 @@
+build --copt="-fopenmp" --linkopt="-fopenmp"

.gitignore

@@ -5,3 +5,15 @@
 *.log
 /vis*
 *.swo
+
+bazel-*
+
+### Automatically added by Hedron's Bazel Compile Commands Extractor: https://github.com/hedronvision/bazel-compile-commands-extractor
+# Ignore the `external` link (that is added by `bazel-compile-commands-extractor`). The link differs between macOS/Linux and Windows, so it shouldn't be checked in. The pattern must not end with a trailing `/` because it's a symlink on macOS/Linux.
+/external
+# Ignore links to Bazel's output. The pattern needs the `*` because people can change the name of the directory into which your repository is cloned (changing the `bazel-<workspace_name>` symlink), and must not end with a trailing `/` because it's a symlink on macOS/Linux.
+/bazel-*
+# Ignore generated output. Although valuable (after all, the primary purpose of `bazel-compile-commands-extractor` is to produce `compile_commands.json`!), it should not be checked in.
+/compile_commands.json
+# Ignore the directory in which `clangd` stores its local index.
+/.cache/

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "files.associations": {
+        "random": "cpp"
+    }
+}

MODULE.bazel

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+###############################################################################
+# Bazel now uses Bzlmod by default to manage external dependencies.
+# Please consider migrating your external dependencies from WORKSPACE to MODULE.bazel.
+#
+# For more details, please check https://github.com/bazelbuild/bazel/issues/18958
+###############################################################################