Update Operaton download and modeler links

[hauptmedia]

Summary

• replace stale Camunda download targets for Operaton distributions with the Operaton GitHub releases
• update Tomcat, WildFly, and Operaton Run installation pages to use Operaton release assets and clarify snapshot prerelease assets where relevant
• clarify the Download introduction page around stable release assets, GitHub snapshot prereleases, pre-packaged Tomcat/WildFly distributions, local documentation links, and Operaton Modeler support
• update database schema installation docs to use Operaton GitHub release SQL script assets instead of a generic artifact repository
• document Central snapshot repository usage on the Maven coordinates page for intentional *-SNAPSHOT dependencies
• remove stale Operaton docs self-links that pointed to non-existent public quick-start and legacy 7.15 documentation paths
• align install, supported-environment, task-form, CMMN, BPMN extension, Cockpit, BPMN modeling, and Operaton Run references with Operaton Modeler instead of Camunda Modeler
• rename the Operaton Modeler installation page from camunda-modeler.md to operaton-modeler.md and update internal links to the new route
• replace stale Modeler product/download links with local Operaton Modeler documentation, the Operaton Modeler repository, or the verified flags source where appropriate
• replace the dead Operaton Forms modeler-docs link with the verified Operaton Modeler form editor source
• update the task-form deployment link to the current Quick Start deploy page without the stale Camunda Modeler anchor
• update get-started installation pages to use the current Operaton distribution scripts (start.bat / start.sh) instead of old start-camunda.* names
• align install prerequisites and supported-environment Java versions with the current Java 17 minimum and Java 17/21/25 support, and replace stale Oracle JDK download URLs

Verification

• rg -n "oracle\\.com/technetwork/java/javase/downloads|Java Runtime Environment 11|Java JDK 11\\+|Java 11 / 17 / 21|Oracle JDK 11 / 17 / 21|OpenJDK 11 / 17 / 21" docs/documentation/introduction/downloading-operaton.md docs/documentation/introduction/supported-environments.md docs/get-started/quick-start/install.md docs/get-started/dmn/install.md -S returns no matches
• curl -I -L -sS --max-time 20 https://www.oracle.com/java/technologies/downloads/ returns HTTP 200
• rg -n "Operaton requires \\*\\*Java 17\\*\\*|Java 17\\*\\*, \\*\\*Java 21\\*\\*, and \\*\\*Java 25" docs/documentation/reference/release-notes -S confirms the release-note source for the aligned Java support
• gh release view --repo operaton/operaton --json tagName,isPrerelease,url,assets confirms the latest stable release is v2.1.1 and includes standalone, Tomcat, WildFly, SQL script, webapp, and REST assets
• gh release view v2.1.1 --repo operaton/operaton --json assets --jq ... confirms the Operaton Run operaton-bpm-2.1.1.tar.gz and operaton-bpm-2.1.1.zip archive names
• gh release view v2.1.1 --repo operaton/operaton --json tagName,isPrerelease,assets --jq ... confirms the stable SQL script asset operaton-sql-scripts-7.24.0.tar.gz
• gh release view 2.2.0-SNAPSHOT --repo operaton/operaton --json name,tagName,isPrerelease,publishedAt,url,assets confirms snapshot distribution assets are published as GitHub prereleases
• gh release list --repo operaton/operaton --limit 20 confirms current snapshot prereleases, including 2.1.2-SNAPSHOT and 2.2.0-SNAPSHOT, are published as GitHub prereleases
• curl -fsSL https://central.sonatype.com/repository/maven-snapshots/org/operaton/bpm/operaton-engine/maven-metadata.xml confirms engine snapshots are available in Central snapshot repository
• curl -fsSL https://central.sonatype.com/repository/maven-snapshots/org/operaton/bpm/operaton-bom/maven-metadata.xml confirms BOM snapshots are available in Central snapshot repository
• curl -fsSL https://central.sonatype.com/repository/maven-snapshots/org/operaton/bpm/webapp/operaton-webapp/maven-metadata.xml and the matching operaton-engine-rest metadata confirm webapp and REST snapshots are available in Central snapshot repository
• gh release list --repo operaton/operaton-modeler --limit 20 returns no published releases, so Modeler install references point to local documentation or the repository instead of claiming release downloads
• gh api 'repos/operaton/operaton-modeler/git/trees/develop?recursive=1' --jq '.tree[].path' | rg 'client/src/app/tabs/(bpmn|dmn|cmmn|form)|client/src/util/Flags\\.js' confirms Operaton Modeler sources for BPMN, DMN, CMMN, forms, and flags
• curl -fsI -L --max-time 20 https://github.com/operaton/operaton-modeler/blob/develop/client/src/util/Flags.js returns HTTP 200
• curl -I -L --max-time 20 https://docs.operaton.org/docs/documentation/modeler/forms/ returns HTTP 404
• curl -I -L --max-time 20 https://github.com/operaton/operaton-modeler/tree/develop/client/src/app/tabs/form returns HTTP 200
• focused rg checks find no stale Camunda download/modeler links, old start-camunda.* scripts, tbd Run download placeholders, or nonexistent Operaton artifact domains in the changed download/install files
• rg -n -i "camunda modeler|camunda-modeler|desktop modeler from camunda|modeler from camunda" docs/documentation/modeling-bpmn/index.md -S returns no matches
• rg -n "documentation/installation/camunda-modeler|installation/camunda-modeler|camunda-modeler\\.md" docs src docusaurus.config.ts -S finds no matches
• rg -n "documentation/installation/operaton-modeler|installation/operaton-modeler|operaton-modeler\\.md" docs src docusaurus.config.ts -S confirms the new route is used
• PR-file URL checker: checked 24 urls across 16 files; problematic 0
• git diff --check
• npm run typecheck
• npm run build succeeds; it reports the known pre-existing Docusaurus link/anchor warnings handled by Fix docs link checks and enforce quality gates #115

[kthoms]

Change to Operaton Modeler?

[hauptmedia]

I changed it to Operaton Modeler