💡 refactor(structure): Improved organization of monorepo packages and implementations

[Charles Hudson (phobetron)]

Restructuring the monorepo around a packages/* layout and align implementation naming with SDK package conventions.

• Move SDK source trees from platforms/javascript/* and universal/* into packages/*, including:
  • packages/universal/{api-schemas,api-client,core-sdk}
  • packages/node/node-sdk (+ packages/node/frameworks/.keep)
  • packages/web/{web-sdk,preview-panel,frameworks/react-web-sdk}
  • packages/react-native-sdk
  • packages/{android,ios} docs
• Rename implementation apps to SDK-oriented names:
  • node-ssr-only -> node-sdk
  • node-ssr-web-vanilla -> node-sdk+web-sdk
  • web-vanilla -> web-sdk
  • web-react -> web-sdk_react
  • react-native -> react-native-sdk
• Update root scripts and commands to new names/paths (package.json), including E2E setup/run targets and lint scope migration from platforms/universal to packages.
• Update workspace/tooling configuration for the new structure: pnpm-workspace.yaml, pnpm-lock.yaml, tsconfig.base.json path aliases, and typedoc.json entry points.
• Rewire CI path filters and E2E jobs in .github/workflows/main-pipeline.yaml to new package and implementation paths, job outputs, command targets, env setup paths, and artifact locations.
• Refresh project docs/governance docs to match renamed paths and commands: README.md, CONTRIBUTING.md, .specify/memory/constitution.md, .specify/research/repository-research.md.
• Update package/build/test config references (rsbuild/rslib/rstest/tsconfig/metro) to relocated dependency paths.
• Remove obsolete tracked Gradle wrapper JARs from legacy React Native locations.

New directory structure:

optimization/
├── implementations/
│   ├── node-sdk/
│   ├── node-sdk+web-sdk/
│   ├── react-native-sdk/
│   ├── web-sdk/
│   └── web-sdk_react/
├── lib/
├── packages/
│   ├── android/
│   ├── ios/
│   ├── react-native-sdk/
│   ├── node/
│   │   ├── frameworks/
│   │   └── node-sdk/
│   ├── universal/
│   │   ├── api-client/
│   │   ├── api-schemas/
│   │   └── core-sdk/
│   └── web/
│       ├── frameworks/
│       │   └── react-web-sdk/
│       ├── preview-panel/
│       └── web-sdk/
├── scripts/
└── specs/

[NT-2544]

[wiz-inc-38d59fb8d7]

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Scanner	Findings
Vulnerabilities	2  3
Sensitive Data	-
Secrets	-
IaC Misconfigurations	-
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Software Management Findings	-
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