voku/itp-context

[*]: prepare changelog for 0.3.0

• moved rule definitions onto RuleIdentifier enums via getDefinition() and removed sibling catalog files from the example, generator and resolver flow
• added ContextReader and token-based degraded summaries so multi-symbol files, functions and non-autoloadable code still expose context
• added richer export metadata (owners, refs, verified_by, annotated_methods, rule_count) plus a queryable export index
• added ContextQuery and the itp-context-query CLI for searching exported context documents
• synced package, example and exported rule metadata with the generator scaffold defaults for owners, refs and proof fields
• expanded package dogfooding annotations and refreshed the committed self-export snapshot
• added a shared docs/skills/itp-context.md agent skill plus thin Copilot, Codex, Claude and Gemini entrypoint files
• clarified that refs can point to any useful architecture context, including ADRs, docs and design notes
• updated the generator and example inline rule definitions to use ADR-style paths as helpful default references
• refreshed README guidance and example docs to show ADRs as one lightweight way to capture missing context

Add PHP 8.5 to CI workflow matrix

• added ContextExporter, ExportWriter, Frontmatter and ExportReport for exporting agent-friendly markdown context files
• added the itp-context-export CLI for batch exporting annotated PHP symbol context trees
• improved TokenParser so export scans ignore ::class references instead of treating them as declarations
• expanded PHPUnit and smoke coverage for frontmatter parsing, export filtering and the export CLI flow
• added package-owned PackageRules dogfood annotations to a few core library services
• added a committed self-export snapshot under docs/package-export and a regression test to keep it in sync
• made #[Rule] repeatable so one symbol can carry multiple architecture rules

cleanup: .gitattributes and .gitignore ...

Merge remote-tracking branch 'origin/main'

• initial extraction of the generic ItpContext framework from IT-Portal
• added rule attribute, enum contract, catalog model and resolver
• added validator, summarizer and generator services
• added CLI wrappers and a minimal example project
• added PHPUnit scaffolding and smoke coverage