fix(examples,dhrobot): repair broken ikine_LMS/ikine_min example references

[petercorke]

Summary

• examples/readme.py and examples/ikine_evaluate.py both called robot.ikine_LMS(...), which hasn't existed since the LM variants were merged into ikine_LM(method=...). ikine_evaluate.py also called the never-existent robot.ikine_min(...).
• Fixed both to use ikine_LM(method="sugihara", k=0.0001) and ikine_LM(joint_limits=False/True) respectively -- k=0.0001 matters here, the default k=1.0 doesn't actually converge for the sugihara method (confirmed by running both scripts end-to-end).
• Also fixed a latent bug in ikine_evaluate.py's timeit benchmark strings: robot.ikine_LM(T, q0) passes q0 positionally, landing in the end= parameter instead of q0=.
• While fixing this, found that DHRobot.ikine_LM (a thin wrapper around ETS.ikine_LM) had its own narrow signature that silently dropped method/k/kq/km -- so DH robots couldn't use the wampler/sugihara variants at all. Widened it to Tep, q0, **ikargs, forwarding everything through, documented via a new shared |ikargs| Sphinx substitution (docs/source/conf.py, matching the existing |BlockOptions| pattern) so the description lives in one place as more ikine_LM wrappers pick it up (relevant for a follow-up PR that touches the rest of the ikine_LM/ik_LM family's docs).

Item 2 of a 4-item IK-solver cleanup plan (see claude-notes/ik-solver-cpp-python-divergence.md); Item 1 (YuMi gripper parent-swap fix) is PR #649.

Test plan

• New regression test: DHRobot.ikine_LM actually forwards method/k to the underlying solver (fails against the old narrow signature)
• Full test suite green (732 passed, 18 skipped) in a clean isolated venv
• Ran both example scripts end-to-end (both DH-robot branches of ikine_evaluate.py, and the IK-relevant portion of readme.py) -- no AttributeError, all rows converge including sugihara
• Sphinx docs build (-W --keep-going) clean of any new warnings from the |ikargs| substitution or DHRobot.ikine_LM's docstring

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (5b5a0fe) to head (c1e4a7e).

Files with missing lines	Patch %	Lines
src/roboticstoolbox/robot/DHRobot.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #650   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files        143     143           
  Lines      14035   14035           
=====================================
  Misses     14035   14035           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.