[ADD] project: help added on project menu items.

addons/hr_timesheet/hr_timesheet_view.xml

addons/hr_timesheet_sheet/hr_timesheet_sheet_view.xml

addons/project/project_view.xml

addons/project/report/project_report_view.xml

addons/project_long_term/project_long_term_view.xml

.../project_long_term/wizard/project_compute_phases_view.xml

addons/project_planning/project_planning_view.xml

addons/resource/resource_view.xml