feat(docs): full Docs API parity — already at parity (batchUpdate), add delete command

[omriariav]

Context

The Google Docs API only has 3 REST methods: get, create, and batchUpdate. gws docs already wraps all three — batchUpdate is used under the hood for append, insert, replace, delete, format, set-paragraph-style, add-list, remove-list, and add-table.

Status: Near-parity

Covered (all 3 API methods)

API Method	gws commands
documents.get	docs read, docs info
documents.create	docs create
documents.batchUpdate	docs append, docs insert, docs replace, docs delete, docs format, docs set-paragraph-style, docs add-list, docs remove-list, docs add-table

Potential additions (higher-level wrappers)

These are not new API methods, but useful CLI convenience commands built on batchUpdate:

Command	Description
docs add-header	Insert header/footer
docs add-page-break	Insert page break
docs add-section-break	Insert section break
docs update-table-cell	Modify table cell content
docs add-inline-image	Insert image by URL

These can be added as needed. Docs is effectively at full API parity already.