Updated build settings and source changes to build on Apple M chip system.

PiperOrigin-RevId: 640181508
Change-Id: I1c2c32269027f8d362f997ff9066041d3cf07c4b

.bazeliskrc

diff --git a/.bazeliskrc b/.bazeliskrc
new file mode 100644
index 0000000..e874f97
--- /dev/null
+++ b/.bazeliskrc
@@ -0,0 +1 @@
+USE_BAZEL_VERSION=6.1.1
\ No newline at end of file

README.md

diff --git a/README.md b/README.md
index 3cb0610..3a02cbf 100644
--- a/README.md
+++ b/README.md
@@ -30,15 +30,25 @@
     against the sail cheriot implementation. For more on that, see the TestRIG
     documentation.
 
-# Building
+## Building
 
-MPACT-Cheriot uses the [bazel](https://bazel.build) build system. This is best
-installed using [bazilisk](https://github.com/bazelbuild/bazelisk). Place a file
-named .bazeliskrc in your home directory specifying a bazel version 6.1.1 or
-later:
+### Bazel
 
-> USE_BAZEL_VERSION=6.1.1
+MPACT-Sim utilizes the [Bazel](https://bazel.build/) build system. The easiest
+way to install bazel is to use
+[Bazelisk](https://github.com/bazelbuild/bazelisk), a wrapper for Bazel that
+automates selecting and downloading the right version of bazel. Use `brew
+install bazelisk` on macOS, `choco install bazelisk` on Windows, and on linux,
+download the Bazelisk binary, add it to your `PATH`, then alias bazel to the
+bazelisk binary.
 
-Once that has been set up, you can build all targets from the top level
-directory using the command `bazel build ...:all`. To run all the tests, use the
-command `bazel test ...:all`.
+### Java
+
+MPACT-Sim depends on Java, so a reasonable JRE has to be installed. For macOS,
+run `brew install java`, on linux `sudo apt install default-jre`, and on Windows
+follow the appropriate instructions at [java.com](https://java.com).
+
+### Build and Test
+
+To build the mpact-sim libraries, use the command `bazel build ...:all` from the
+top level directory. To run the tests, use the command `bazel test ...:all`