feat(pdftract-l993m): complete per-language Tera template scaffolding
Complete the Tera template scaffolding for all 8 subprocess-based SDKs
under templates/sdk-skeleton/<lang>/: node, go, java, dotnet, ruby,
php, swift, python-subprocess.
Each template directory contains:
- Package metadata template (package.json, go.mod, pom.xml, etc.)
- Method stubs template (methods.ts, client.go, Methods.java, etc.)
- Error stubs template (errors.ts, errors.go, Errors.java, etc.)
- Conformance runner template (conformance.test.ts, etc.)
- README template with {{ version }} variable substitution
- GENERATED.tera marker file
New files for python-subprocess:
- pdftract_subprocess/codegen/errors.py.tera
- tests/codegen/conformance_test.py.tera
- README.md.tera
- GENERATED.tera
All 8 language template directories are now complete and ready for
consumption by the `pdftract sdk codegen` subcommand.
Co-Authored-By: Claude Code <noreply@anthropic.com>
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