Fix docs/implementation consistency issues; convert naming-only $id to title

[wol-soft]

Summary

Reviewed docs/source and README.md for divergence from the actual implementation, and for $id usage where title should be used instead.

• Converted $id usages that only existed to name example classes into title, matching the real class-naming priority (title outranks $id, verified against ClassNameGenerator). generic/references.rst keeps $id since it specifically documents id-based $ref resolution — its root-level values were changed to realistic URIs instead.
• Fixed stale API references: new Generator() → new ModelGenerator(), setter return types shown as a concrete class instead of static, getRawModelDataInput() (doesn't exist anywhere in the codebase) → meta()->rawInput(), NestedObjectException's wrong namespace (Generic → Object).
• Fixed invalid JSON in several example schemas (missing/trailing commas) and several wrong setter parameter names that didn't match their actual property (verified against the Model.phptpl naming rule).
• Fixed broken/wrong doc links and a duplicated toctree entry for customDraft.
• Corrected generic/meta.rst's outdated "ID" naming explanation (it predated title support) and added the missing $anchor step to complexTypes/object.rst's naming priority list.
• Documented minContains/maxContains (fully implemented, previously undocumented anywhere), the Draft_2019_09/Draft_2020_12 draft classes (existing, tested, but absent from the docs' draft table), and the enum exception message truncation behavior for enums with more than 8 values.
• Verified exception message wording, getter names, and behavior claims against the sibling php-json-schema-model-generator-production repo where docs quote its classes directly.

Test plan

• Extracted and validated every JSON code block across docs/source with a script; all now parse as valid JSON (excluding intentionally-abbreviated fragments using ...)
• Checked every relative doc link (file + anchor) against actual files/headers; no remaining broken links
• Cross-checked exception messages, getter names, and class namespaces against src/ and the production repo
• docs/ not rendered with Sphinx in this session — recommend a docs build to catch any RST syntax issues before merge

🤖 Generated with Claude Code

https://claude.ai/code/session_01TcoPe6sLfqkEqNEBoV2Wgi

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Generated by Claude Code

[coveralls]

Coverage Report for CI Build 31333517295

Coverage remained the same at 98.76%

Details

• Coverage remained the same as the base build.
• Patch coverage: No coverable lines changed in this PR.
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	7341
Covered Lines:	7250
Line Coverage:	98.76%
Coverage Strength:	1664.24 hits per line

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💛 - Coveralls