Updates for Garden

[mjcarroll]

Initial setup:

# Get bazelisk (bazel version manager)
wget https://github.com/bazelbuild/bazelisk/releases/download/v1.16.0/bazelisk-linux-amd64
# Move somewhere in your pat
mv bazelisk-linux-amd64 ~/.local/bin/bazel
chmod +x ~/.local/bin/bazel

mkdir workspace
cd workspace 
git clone https://github.com/gazebosim/gz-bazel bazel -b mjcarroll/garden_bazel

ln -sf bazel/example/bazelproject.example .bazelproject
ln -sf bazel/example/bazelrc.example .bazelrc
ln -sf bazel/example/BUILD.bazel.example BUILD.bazel
ln -sf bazel/example/WORKSPACE.bazel.example WORKSPACE.bazel
vcs import . < bazel/example/bazel.repos

# To build
bazel build //...

# To build common
bazel build //common/...

# To test
bazel test //...

[nkoenig]

The purpose of this PR is to migrate from igntion to gazebo?

[mjcarroll]

The purpose of this PR is to migrate from igntion to gazebo?

As well as update all of our dependencies, etc. There will be also be a series of PRs to adjust individual library builds.

[mjcarroll]

Replaced by #44