`docx.kit.patch.apply(doc, ops)` applies a list of RFC-6902 JSON
Patch operations (`add` / `remove` / `replace` / `move` / `copy` /
`test`) against a stable, addressable subset of the document's
structural model — paragraphs (by index or `w14:paraId`), table
cell text, and section page orientation. All ops are validated
against an in-memory shadow of the document before any mutation
reaches the live tree, so a failing op leaves the document
untouched (all-or-nothing semantics).

Path scheme:

* `/paragraphs/N[/text|/style]` — N is 0-indexed; negative N counts
  from the end; `-` after `add` appends a new paragraph (value is a
  `{"text": ..., "style": ...}` mapping).
* `/by_id/<paraId>[/text|/style]` — keyed on the stable
  `w14:paraId` Word stamps on every paragraph.
* `/tables/N/rows/M/cells/K/text`.
* `/sections/N/page_orientation` — `"portrait"` / `"landscape"`.

Failures raise a `PatchError` subclass: `PathNotFound`,
`PatchTestFailed`, or `InvalidOp`. Returns `None` on success.

The implementation vendors a small RFC-6902 dispatcher; no
`jsonpatch` PyPI dependency is added. Stdlib-only.

closes python-openxml#302

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

feat(docx-kit): patch — RFC-6902 JSON-patch over the structural model (python-openxml#302)

`docx.kit.patch.apply(doc, ops)` applies a list of RFC-6902 JSON
Patch operations (`add` / `remove` / `replace` / `move` / `copy` /
`test`) against a stable, addressable subset of the document's
structural model — paragraphs (by index or `w14:paraId`), table
cell text, and section page orientation. All ops are validated
against an in-memory shadow of the document before any mutation
reaches the live tree, so a failing op leaves the document
untouched (all-or-nothing semantics).

Path scheme:

* `/paragraphs/N[/text|/style]` — N is 0-indexed; negative N counts
  from the end; `-` after `add` appends a new paragraph (value is a
  `{"text": ..., "style": ...}` mapping).
* `/by_id/<paraId>[/text|/style]` — keyed on the stable
  `w14:paraId` Word stamps on every paragraph.
* `/tables/N/rows/M/cells/K/text`.
* `/sections/N/page_orientation` — `"portrait"` / `"landscape"`.

Failures raise a `PatchError` subclass: `PathNotFound`,
`PatchTestFailed`, or `InvalidOp`. Returns `None` on success.

The implementation vendors a small RFC-6902 dispatcher; no
`jsonpatch` PyPI dependency is added. Stdlib-only.

closes python-openxml#302

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

feat(docx-kit): patch — RFC-6902 JSON-patch over the structural model (python-openxml#302)