docs: descriptive markdown for services

[google-labs-jules]

Refactored the documentation in docs/services/ to replace raw AST dumps with human-readable, descriptive Markdown.

• Updated core.md to reflect the current Core struct and methods.
• Updated runtime.md to describe the Runtime wrapper and ServiceRuntime.
• Updated config.md to document the Config interface.
• Rewrote crypt.md, display.md, help.md, i18n.md, workspace.md to properly describe the service interfaces and types, derived from the previous AST dumps.
• Corrected import paths and initialization code in docs/index.md to match the current project structure.

Note: The codebase seems to be in a state where some services (Display, etc.) referenced in tests are missing from the core package, causing task test to fail compilation. The documentation update reflects the apparent intent of these services based on the previous docs and typical usage patterns, while accurately describing the existing core implementation.

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PR created automatically by Jules for task 11758873554422912499 started by @Snider

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