chore(webjar): adjust webjar structure
chore(webjar): adjust webjar structure

to fix spring boot starter property
for disabling redirection to index.html page

/META-INF/resources
    |
    |--/plugin
        |
	|--/admin
	|--/cockpit
	|--/tasklist
    |
    |--/webjars/camunda
        |
        |--index.html
        |--securityFilterRules.json
        |--/app
        |--/lib

Related to CAM-9137

langfr/camunda-bpm-platform,camunda/camunda-bpm-platform,falko/camunda-bpm-platform,xasx/camunda-bpm-platform,xasx/camunda-bpm-platform,falko/camunda-bpm-platform,camunda/camunda-bpm-platform,camunda/camunda-bpm-platform,langfr/camunda-bpm-platform,langfr/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,langfr/camunda-bpm-platform,falko/camunda-bpm-platform,camunda/camunda-bpm-platform,xasx/camunda-bpm-platform,falko/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,camunda/camunda-bpm-platform,langfr/camunda-bpm-platform,xasx/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,falko/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,xasx/camunda-bpm-platform,camunda/camunda-bpm-platform,falko/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,langfr/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,xasx/camunda-bpm-platform