Hardcoded dependency path

[ssabug]

Hello,

First, thank you for sharing this plugin.

in CMakeLists.txt, the path to the JUCE library is hardcoded, therefore, nobody except you can build this project .
set(JUCE_DIR "C:/MS/Build/_deps/juce-src")

Moreover, putting absolute path kills the cross-platform feature of cmake, which is one of the main reason people take time to implement it in their project .

Cmake enables retrieving automatically JUCE sources from github, so why should we deprive ourselves ?

With cmake_minimum_required(VERSION 3.15) fulfilled, we can replace it with

include(FetchContent)

# -------------------------------------------------
# Fetch JUCE
# -------------------------------------------------
FetchContent_Declare(
    juce
    GIT_REPOSITORY https://github.com/juce-framework/JUCE.git
    GIT_TAG 8.0.12
)

FetchContent_MakeAvailable(juce)

This will automatically download JUCE v8.0.12 sources and make them available for the build. Interesting, isn't it?