chore(was-guide): extend docs for was installation/migration

related to #CAM-2978
chore(getting-started): add camunda bom to maven coordinates

related to #CAM-2998
chore(docs): add recommendation and link for camunda BOM

related to #CAM-2998
chore(user-guide): move task forms to top level

chore(references): add embedded forms reference from sdk-js

related to CAM-3072
chore(case/REST): adjust docs about case execution

related to CAM-2871
fix(task/REST): adjust query options
impr(user guide): add advanced tasklist style customization section

Related to: CAM-3088
chore(wls): rar is now embedded in ear

related to #CAM-3086
chore(userguide): use serialization data format constants

related to #CAM-2890
chore(getting-started): use 7.2 directives in embedded forms

related to CAM-3109
chore(getting-started): update screenshots of tasklist forms

related to CAM-3109
feat(rest): add HAL relations cache description

related to #CAM-2933
chore(rest): add activityType to case activity instance result

related to #CAM-2871
chore(getting-started): fix minor inconsistencies
feat(references): add spin and connect docs

related to #CAM-3029
chore(get-started): adjust getting started

related to CAM-3109
chore(rest): add activityId to Job query GET/POST and count GET/POST

related to #CAM-3085
chore(refs): rename connect & spin references

related to #CAM-3029
chore(getting-started): fix typo in java ee tutorial
chore(userguide/dataformats): add link to reference