Adding README.md documentation for several derivation framework packages

Adding README.md documentation for several derivation framework packages

added Derivation master labels

assigned to @jcatmore

This merge request affects 4 packages:

• PhysicsAnalysis/DerivationFramework/DerivationFrameworkConfiguration
• PhysicsAnalysis/DerivationFramework/DerivationFrameworkCore
• PhysicsAnalysis/DerivationFramework/DerivationFrameworkInterfaces
• PhysicsAnalysis/DerivationFramework/DerivationFrameworkTools

Affected files list will not be printed in this case

Adding @jcatmore as watcher

added review-pending-level-1 label

The system determined that CI tests (with names matching "^CITest_SimulationRun(2|3)AF3.*$") are not needed for this code change. They are not run. This is not an indicator to restart the job.

CI Result SUCCESS (hash c9831807)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 57851]

lgtm approving -- L1

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 9845f9ca

added sweep:ignore label