feat(core): add enhanced wait strategies

[terry-docker]

• Add HttpWaitStrategy for HTTP endpoint waiting with TLS, auth, headers support
• Add HealthcheckWaitStrategy for Docker health check status monitoring
• Add PortWaitStrategy for TCP port availability checking
• Add FileExistsWaitStrategy for filesystem file existence waiting
• Add CompositeWaitStrategy for combining multiple wait conditions
• Include comprehensive unit tests for all new strategies
• Enhanced error messages with actionable hints for debugging
• Maintain backward compatibility with existing LogMessageWaitStrategy
• Fix mypy type annotations for all new wait strategies

[codecov]

Codecov Report

❌ Patch coverage is 66.80328% with 81 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@003046b). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
core/testcontainers/core/wait_strategies.py	66.80%	75 Missing and 6 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #855   +/-   ##
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  Coverage        ?   78.67%           
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  Files           ?       14           
  Lines           ?     1130           
  Branches        ?      172           
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  Hits            ?      889           
  Misses          ?      201           
  Partials        ?       40           

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