feat: support Typer vendored Click dialects

[codeforester]

Summary

Closes #107.

• add a private Click dialect boundary for public Click and Typer's vendored Click fork
• generate lifecycle options, path types, version options, and exception handling from the owning dialect
• extend base-cli[typer] and the Beacon/example metadata through Typer <0.28
• add a Typer 0.25.1/0.26.0/0.27.1 x Python 3.10–3.14 compatibility matrix
• document the supported boundary and update adapter coverage for version/help/validation/nested commands

Validation

• pytest -q with Typer 0.25.1
• pytest -q with Typer 0.27.1 vendored Click
• ruff check lib/python tests scripts compatibility
• scripts/validate_consumers.py
• workflow YAML parsed successfully

The isolated wheel build could not run locally because the sandbox has no PyPI DNS access; CI will build the wheel in the existing downstream workflow.