Fix Julia heredoc escaping issues in install_rms.sh

Use quoted heredoc delimiters ('EOF' instead of EOF) to prevent bash from
interpreting backslashes and variable substitutions within Julia code blocks.
This fixes ParseError caused by escaped quotes being consumed by bash.
Also changed to access shell variables via Julia's ENV dict for clarity.

Seemed to be a problem only on the macos github runner.
Hopefully this works cross platform.

Author: rwest

install_rms.sh

@@ -132,11 +132,11 @@ EOF
 # Install RMS
 if [ "$RMS_INSTALLER" = "standard" ] || [ "$RMS_INSTALLER" = "continuous" ]; then
     echo "Installing RMS from branch: $RMS_BRANCH"
-    julia << EOF || echo "RMS standard install error - continuing anyway ¯\\_(ツ)_/¯"
+    julia << 'EOF' || echo "RMS standard install error - continuing anyway ¯\\_(ツ)_/¯"
     using Pkg
     Pkg.activate(ENV["PYTHON_JULIAPKG_PROJECT"])
-    Pkg.add(Pkg.PackageSpec(name="ReactionMechanismSimulator", url="https://github.com/ReactionMechanismGenerator/ReactionMechanismSimulator.jl.git", rev="$RMS_BRANCH"))
-    println(read(joinpath(dirname(pathof(ReactionMechanismSimulator)), \"..\", \"Project.toml\"), String))
+    Pkg.add(Pkg.PackageSpec(name="ReactionMechanismSimulator", url="https://github.com/ReactionMechanismGenerator/ReactionMechanismSimulator.jl.git", rev=ENV["RMS_BRANCH"]))
+    println(read(joinpath(dirname(pathof(ReactionMechanismSimulator)), "..", "Project.toml"), String))
     Pkg.instantiate()
     try
         @info "Loading RMS"
@@ -150,11 +150,11 @@ if [ "$RMS_INSTALLER" = "standard" ] || [ "$RMS_INSTALLER" = "continuous" ]; the
 EOF
 elif [ "$RMS_INSTALLER" = "developer" ]; then
     echo "Installing RMS in developer mode from path: $RMS_PATH"
-    julia << EOF || echo "RMS developer install error - continuing anyway ¯\\_(ツ)_/¯"
+    julia << 'EOF' || echo "RMS developer install error - continuing anyway ¯\\_(ツ)_/¯"
     using Pkg
     println(ENV["PYTHON_JULIAPKG_PROJECT"])
     Pkg.activate(ENV["PYTHON_JULIAPKG_PROJECT"])
-    Pkg.develop(path="$RMS_PATH")
+    Pkg.develop(path=ENV["RMS_PATH"])
     Pkg.instantiate()
     try
         @info "Loading RMS"