Epic: Create requirements for feature "Communication"

[markert-r]

Create requirements according to S-CORE process

• Stakeholder requirements
• Feature requirements
• Component requirements

Link requirements

[hoe-jo]

Initial Version of Feature Requirements in S-Core:
https://github.com/eclipse-score/score/blob/main/docs/features/communication/ipc/requirements/index.rst

A restructuring of the feature requirements is also done in this PR:
#1133

Further Work is blocked by cross-repo-docs issues:
#1103

Additionally Work is being slowed down due to bug in tooling support:
#1117