Add JetBrains IDE plugin shell

[NWYLZW]

Summary

• add the One Works JetBrains IDE plugin shell under apps/idea-plugin
• start one project-local oneworks web runtime per IDE project and load it through a JCEF tool window
• add IDEA plugin CI/release workflows, release-tag dispatch, docs, changelog, and module notes

Compatibility

• plugin declares since-build=243 and depends on com.intellij.modules.platform
• targets JetBrains IDEs based on IntelliJ Platform 2024.3+, including IntelliJ IDEA and WebStorm
• CI currently builds/verifies against IntelliJ IDEA 2024.3.6; product-specific verifier jobs and Marketplace publishing are not automated yet

Validation

• GRADLE_USER_HOME=/tmp/codex-gradle-home /tmp/codex-gradle/gradle-9.0.0/bin/gradle --no-daemon -Dorg.gradle.vfs.watch=false buildPlugin verifyPluginStructure
• pnpm typecheck
• pnpm exec dprint check .github/workflows .github/AGENTS.md apps/idea-plugin .oo/docs/usage/idea-plugin.md .oo/docs/en/usage/idea-plugin.md .oo/docs/index.md .oo/docs/en/index.md changelog/0.1.0-alpha.0/idea-plugin.md pnpm-lock.yaml
• ruby -e 'require "yaml"; Dir[".github/workflows/*.yml"].sort.each { |path| YAML.load_file(path); puts path }'
• git diff --check
• pnpm exec vitest run scripts/__tests__/release-tags.spec.ts