feat(pyproject): release v1.7.0 — Python pyproject.toml version bump

Add internal/pyproject package with ReadVersion and WriteVersion for
pyproject.toml files. Reads [project].version (PEP 621) first, then
falls back to [tool.poetry].version. Section boundaries are detected
via TOML's rule that headers always start at the beginning of a line
(\n[ pattern), so inline arrays with [ characters don't interfere.

Config follows the established multi-value pattern:
- python.pyproject_toml: single path (opt-in, no default)
- python.pyproject_tomls: list for monorepos (overrides single)
- --pyproject flag overrides pyproject_toml and clears pyproject_tomls

100% per-package statement coverage maintained across all 14 packages;
FuzzReadVersion and FuzzWriteVersion added per fuzzing guidelines.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/content/changelog.md

@@ -3,6 +3,12 @@ title: Changelog
 weight: 50
 ---
 
+## v1.7.0 — 2026-07-12
+
+### Added
+
+- **Python `pyproject.toml` support** — opt-in via `python.pyproject_toml` (single) or `python.pyproject_tomls` (list); reads `[project].version` (PEP 621) first, then `[tool.poetry].version`; original formatting preserved; `--pyproject <path>` CLI flag for one-off overrides
+
 ## v1.6.0 — 2026-07-11
 
 ### Added