Add installation and other info for C++ implementation #4

	name: Software_check
	on:
	push:
	pull_request:
	types: [opened]
	jobs:
	check_compile-job:
	runs-on: ubuntu-latest
	container:
	image: cmscloud/al9-cms:latest
	options: --user root
	steps:
	- name: Checking_out_code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Checking_python_3.9
	run: \|
	python3 -V
	ls
	pwd
	python3 -m py_compile src/cmsstyle/cmsstyle.py
	ls -lh src/cmsstyle/__pycache__/
	- name: Checking_Cpp_compilation
	run: \|
	cd src
	echo '{gROOT->LoadMacro("cmsstyle.C++");}' > hola.C

	dnf install -y root
	echo 'ROOT VERSION='`root-config --version`
	root -q hola.C
	ls -lh cmsstyle_C.so
	#
	py2-job:
	runs-on: ubuntu-latest
	container:
	image: cmscloud/cc7-cms:latest
	options: --user root
	steps:
	- name: Checking_python_2.7
	# uses: actions/checkout@v4
	# with:
	# fetch-depth: 0
	run: \|
	python -V
	ls
	git clone --depth 1 https://github.com/oglez/cmsstyle.git
	cd cmsstyle
	pwd
	python -m py_compile src/cmsstyle/cmsstyle.py
	ls -lh src/cmsstyle/cmsstyle.pyc
	#

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