install nlohmann/json from package like ROOT does

[tomeichlersmith]

I am adding a new package to the container, here are the details.
ROOT will build in nlohmann/json if it is not available already and we want a JSON reader/writer anyways, so I'm installing it from Ubuntu repos like ROOT does in its official images.

What new packages does this PR add to the development image?

• nlohmann/json

Check List

• I CI successfully built the container using docker

• I CI was able to build ldmx-sw using this new container build

• I CI was able to test run a small simulation and reconstruction inside this container

• I was able to successfully use the new packages.

I wanted to make sure that we could use find_package in ldmx-sw to deduce if nlohmann/json is available.
If it isn't, we could then use FetchContent to make sure that ldmx-sw can still be built with older images.
Added a line to ldmx-sw/CMakeLists.txt:

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e3e0c698..98e427e9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,6 +23,8 @@ project(LDMX_SW VERSION ${LDMXSW_VERSION_NUM}
                 LANGUAGES CXX    
 )
 
+find_package(nlohmann_json 3.10.5 REQUIRED)
+
 set(CMAKE_CXX_STANDARD 20)
 
 # Load additional macros used by this project. 

which gives (when running just configure after just use ldmx/dev:global-install-nlohmann-json):

-- Found nlohmann_json: /usr/share/cmake/nlohmann_json/nlohmann_jsonConfig.cmake (found suitable version "3.11.3", minimum required is "3.10.5")