Add build documentation for Bazel users (#216)

Co-authored-by: Fædon Jóhannes Sinis <[email protected]>

Author: phaedon

docs/docs/build/building.md

@@ -30,3 +30,31 @@ When using Visual Studio on Windows, CMake can be used (either via the terminal
 ## Compile flags & options
 
 The library includes a few optional safety checks which are performed at runtime, even in release mode. Such checks are generally very cheap yet quite useful. Nonetheless, adding the `NGC_SAFETY_CHECKS` define will disable all optional safety checks, for a very small increase in performance.
+
+## Bazel
+
+geometry-central is now available as a Bazel module: https://registry.bazel.build/modules/geometry-central
+
+To use it, simply add this line to your MODULE.bazel:
+
+`bazel_dep(name = "geometry-central", version = "1.0.0")`
+
+and then specify the dependencies in your build rules. There are four public targets, which correspond to the groupings in the source code: 
+ - `@geometry-central//:numerical`
+ - `@geometry-central//:surface`
+ - `@geometry-central//:pointcloud`
+ - `@geometry-central//:utilities`
+
+For example:
+
+```python
+cc_binary(
+    name = "main",
+    srcs = ["main.cpp"],
+    data = ["fox.ply"],
+    deps = [
+        "@geometry-central//:surface",
+        "@geometry-central//:utilities",
+    ],
+)
+```