Merge branch 'feature/additional_nodes' of hf.co:spaces/inpeek/kibanda-customer-support-agent

feat: added email to check user identification

fix: changed typing to typing_extensions for TypedDict

feat: updated user information after identification to set missing information

feat: renamed files and adjusted prompts (all in german now)

feat: updated logic to identify usere

feat: send-demand node to generate mail, if information are missing

feat: update users with addresses in berlin and added real-world examples

feat: addapted layout ans added information for single ticket

feat: new node to separate topics

feat: extract mock user into own file

feat: initial commit kibanda agent