Convert Python codegen templates from py2 to py3 style annotations

[aaron-skydio]

Update jinja templates to generate Python 3-style inline type annotations
instead of Python 2-style comment annotations (# type: ...).

Changes:

• Update function_declaration macro in util.jinja to use inline annotations
• Add from __future__ import annotations to all Python templates for
  postponed annotation evaluation (PEP 563)
• Convert all method signatures in geo_package/CLASS.py.jinja and
  cam_package/CLASS.py.jinja to py3-style
• Update custom_methods templates (rot2, rot3, pose2, pose3, unit3)
• Update ops templates (group_ops, lie_group_ops, camera_ops)
• Format function parameters with 4-space indentation, no trailing comma
• Remove unnecessary blank lines before "# Total ops:" comments
• Order ruff noqa comments before future imports

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 4.5 noreply@anthropic.com

Topic: py3-annotations

[aaron-skydio]

Reviews in this chain:
└#450 Convert Python codegen templates from py2 to py3 style annotations

[aaron-skydio]

#	head	base	diff	date	summary
0	486f6eb6	f9420dc8	diff	Dec 23 18:49 PM	59 files changed, 890 insertions(+), 1124 deletions(-)
1	cbbc146c	f9420dc8	diff	Dec 26 15:25 PM	6 files changed, 34 insertions(+), 24 deletions(-)