HR Doc drive by process

Currently HR doc main chapters are on core HR object, I propose to group them in a chapter and having a chapter by process in the same level bot group in the HR Process.

Each process is described via a scenario explained like a tutorial, and each time a core object is used, a link is done to its chapter.

To help review : doc with these modifications are available at https://ofbizadoc.ofbizextra.org/html5/user-manual.html#_human_resources
and Apache OFBiz standard (without modifications) is available too at https://ofbizadoc.ofbizextra.org/html5/user-manual-std.html#_human_resources

current HR TOC
----------------------
3.2. Human Resources
    3.2.1. About Human Resources
    3.2.2. Human Resources Processes
    3.2.3. Employee Positions
    3.2.4. Employees
    3.2.5. Employments
    3.2.6. Performance Review
    3.2.7. Qualifications
    3.2.8. Recruitment
    3.2.9. Skills
    3.2.10. Resumes
    3.2.11. Training
    3.2.12. Leave
    3.2.13. Security
    3.2.14. Global HR Settings
    3.2.15. Glossary
Proposed HR TOC
------------------------
4. Human Resources
    4.1. About this documentation
    4.2. About Human Resources
    4.3. HR Processes
        4.3.1. Organization, Job Position and Definition
        4.3.2. Recruitment, Candidate Selection and Hiring
        4.3.3. Employee Training and Development
        4.3.4. Performance Management and Employee Evaluation
        4.3.5. Employee Salary and Benefits Administration
    4.4. HR core object
        4.4.1. Employee Positions
        4.4.2. Employees
        4.4.3. Employments
        4.4.4. Performance Review
        4.4.5. Qualifications
        4.4.6. Recruitment
        4.4.7. Skills
        4.4.8. Resumes
        4.4.9. Training
        4.4.10. Leave
        4.4.11. Security
    4.5. Global HR Settings
        4.5.1. Skills Types
    4.6. HR Data model
        4.6.1. Employee Position
        4.6.2. Employment
        4.6.3. Qualification, Skill, Review
        4.6.4. HR App intra-application integration
    4.7. Glossary