Add bazel support

BUILD.bazel

@@ -3,8 +3,15 @@ load("@rules_cc//cc:defs.bzl", "cc_library")
 
 # Header-only rule to export catch2/catch.hpp.
 cc_library(
-  name = "catch2",
-  hdrs = ["single_include/catch2/catch.hpp"],
-  visibility = ["//visibility:public"],
-  includes = ["single_include/"],
+    name = "catch2",
+    hdrs = ["single_include/catch2/catch.hpp"],
+    includes = ["single_include/"],
+    visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "catch2_with_main",
+    srcs = ["src/catch_with_main.cpp"],
+    visibility = ["//visibility:public"],
+    deps = ["//:catch2"],
 )

docs/slow-compiles.md

@@ -75,6 +75,7 @@ implementation and C++ linking limitations.
 As with the `Catch2` target, the `Catch2WithMain` CMake target can be used
 either from a subdirectory, or from installed build.
 
+
 ### CMake
 ```cmake
 add_executable(tests-factorial tests-factorial.cpp)
@@ -82,6 +83,20 @@ add_executable(tests-factorial tests-factorial.cpp)
 target_link_libraries(tests-factorial Catch2::Catch2WithMain)
 ```
 
+### bazel
+```python
+cc_test(
+    name = "hello_world_test",
+    srcs = [
+        "test/hello_world_test.cpp",
+    ],
+    deps = [
+        "lib_hello_world",
+        "@catch2//:catch2_with_main",
+    ],
+)
+```
+
 
 ## Other possible solutions
 You can also opt to sacrifice some features in order to speed-up Catch's compilation times. For details see the [documentation on Catch's compile-time configuration](configuration.md#other-toggles).