add customization form fields for perspectives and developer catalog

[debsmita1]

Solution description:

• added Customize menu action in the cluster details page
• added customization form fields for perspectives and dev catalog types
• the addPage , catalog types, and perspectives customization reads from the SERVER_FLAGS

./bin/bridge -developer-catalog-types '{ "state": "Disabled" ,"disabled": ["HelmChart", "Devfile"] }'

Screen.Recording.2022-10-07.at.10.54.39.PM.mov

./bin/bridge -perspectives '[{ "id" : "dev", "visibility": {"state": "AccessReview" , "accessReview": { "missing" : [{ "resource" : "namespaces", "verb" : "list" }]}}}, { "id" : "dev-test", "visibility": {"state" : "Enabled" }}, { "id" : "admin", "visibility": {"state" : "Disabled" }}]'

Screen.Recording.2022-10-07.at.10.55.24.PM.mov