Updated instructions to align with SuiteCRM 8+ folders

[Ozzie76]

Hi,
I once had this working in a trial setting on a SuiteCRM 7 version, but can't get it to work on 8+.
Tried several times and even considered switching systems to get this functionality. Dolibarr has a pretty sweet one which worked on the first try; https://github.com/Befox/cdav and https://github.com/Dolibarr/dolibarr/tree/7a389299c31986e7ae354cdf7141eaf28e6a8a39/htdocs/includes/sabre

My issues are that A) the directories have changed since the introduction of SuiteCRM-Core and the /legacy directory.
Plus B) the use of the composer. From what I understand Composer can be run on both the root directory and the legacy directory.
After upgrading to 8.5.1, I tried;

1. installing the DAVServer files in the directory: /public/legacy/custom/DAVServer/
2. installing the suiteDav.json file in the directory: /public/legacy/custom/Extension/application/Ext/Composer/SuiteDav/
3. edited the file /public/legacy/composer.json and added ["sabre/dav": "*"] to the "require" section.
4. in the same file, I left the line in the "require-dev" section unchanged: ["phpunit/phpunit": "^9.5",]
5. executed [composer update sabre/dav] from the directory /public/legacy/ as per Sabre DAV instructions.

Are these steps correct, or have I derailed somewhere. Plus, is there a way to do this without composer; like a package with compiled files?