Add modern CWMS tabular data upload

[krowvin]

Summary

• convert Ivan's vanilla tabular-data prototype into the reusable React CWMSDataUpload input integrated with CWMSForm
• add Groundwork hooks and helpers for workbook validation, CDA comparison, plotting, filtering, and confirmed submission/deletion workflows
• replace the prototype's vendored libraries, standalone styles, sample binaries, and static assets with current Groundwork components and Tailwind styling
• export the new form surface and add focused component/helper tests, a Changeset, and an interactive documentation route

Validation

• npm test — 14 test files and 51 tests passed
• npm run build-lib
• npm run build-docs-prod
• npm run check-changeset
• interactive docs route verified in a browser with upload controls, table, plot, and filtering rendered without console errors
• npm audit --omit=dev --audit-level=high — no high-severity production advisories; two moderate transitive uuid advisories remain through ExcelJS

[krowvin]

I'll start converting this to React, Tailwind CSS, Groundwork, and Groundwork Water components, hooks, forms, styles, and documentation.

[krowvin]

CWMSDataUpload preview

The interactive docs example uses controlled in-memory rows, so it demonstrates the complete presentation and form-registration path without reading from or writing to CDA.

Workbook upload and summary

Workbook time-series plot

Validated row preview