Mypy nav2 common

[leander-dsouza]

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Basic Info

Info	Please fill out this column
Ticket(s) this addresses	#4916
Primary OS tested on	Ubuntu
Robotic platform tested on	N/A
Does this PR contain AI generated software?	No

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Description of contribution in a few bullet points

• Restructured nav2_common for strict mypy.

Description of documentation updates required from your changes

• N/A

Description of how this change was tested

• Ran colcon build and colcon test to test the changes.

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Future work that may be required in bullet points

For Maintainers:

• Check that any new parameters added are updated in docs.nav2.org
• Check that any significant change is added to the migration guide
• Check that any new features OR changes to existing behaviors are reflected in the tuning guide
• Check that any new functions have Doxygen added
• Check that any new features have test coverage
• Check that any new plugins is added to the plugins page
• If BT Node, Additionally: add to BT's XML index of nodes for groot, BT package's readme table, and BT library lists

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

see 2 files with indirect coverage changes

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[mergify]

⚠️ The sha of the head commit of this PR conflicts with #5031. Mergify cannot evaluate rules on this PR. ⚠️