Issue/175 Template Engine for HTML UIs

[hhund]

• Now using thymeleaf template engine to generate html
• Adds new UIs for some resources and search-sets
• Adds copy button for Task and QuestionnaireReponse html Input fields
• Adds insert placeholder button for boolean input fields
• Adds support for empty QuestionnaireReponse items and Task inputs using the FHIR data absent reason extension https://hl7.org/fhir/R4/extension-data-absent-reason.html
• Switching between html, json and xml views now pushes browser history entries
• Adds shortcuts (h, j, x) to switch between html, json and xml views. Shortcuts need to be used with browser specific modifier keys, see https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/accesskey
• Optional QuestionnaireResponse items
• UI mod feature allowing overrides of static resources via ui folder bind mound
• UI theme feature allowing configuration of a color indicator top page border for dev, test and prod deployment environments
• Initial BPE UI implementation listing deployed processes, active process instances, showing process BPMNs and allowing download of BPMNs.
• Revoked the authentication and authorization of BPE users, now using the same role config as the fhir
  server. Currently only one role is defined "ADMIN". Access to BPE UI with the organization client certificate is not granted by default, but can be enabled by adding a role config the the "ADMIN" role for the certificate thumbprint.
• Added a bpe rev proxy docker image similar to the existing fhir rev proxy docker image.
• The jetty authentication / authorization code now also sets UserIdentity roles, enabling the use of jakarta.annotation.security.{DenyAll, PermitAll, RolesAllowed}
  annotations on webservices.
• Added a new AuthenticationFilter (in common-auth) implementing the jakarta.ws.rs.container.ContainerRequestFilter interface to the bpe and fhir jersey applications to make sure (on the jersey layer) that access to all webservices is only granted to authenticated users.

closes #175
closes #160