fix: update typer to >=0.12.5 for PEP 604 union type support

[bigcat88]

This PR is based on the this one: #356

Fixes #355

PR #349 changed Optional[bool] type hints to bool | None syntax, but typer < 0.12.4 does not support PEP 604 union types, causing RuntimeError: Type not yet supported: bool | None.

Changes:

• Update typer dependency from >=0.9 to >=0.12.5 (adds PEP 604 support via typer#548)
• Remove deprecated is_flag parameter from typer.Option() calls (deprecated in typer 0.15.0, never worked properly)

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	typer@​0.16.0 ⏵ 0.21.1	+1

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #357      +/-   ##
==========================================
- Coverage   51.93%   51.33%   -0.61%     
==========================================
  Files          32       32              
  Lines        3489     3563      +74     
==========================================
+ Hits         1812     1829      +17     
- Misses       1677     1734      +57     

Files with missing lines	Coverage Δ
comfy_cli/cmdline.py	49.39% <ø> (ø)
comfy_cli/command/custom_nodes/command.py	43.19% <ø> (ø)

... and 3 files with indirect coverage changes

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