feat(inflekt): add shared name-matching utilities and case helpers

[pyramation]

Summary

Adds shared utilities to inflekt to consolidate duplicated name-matching and case-conversion logic scattered across the constructive monorepo (specifically graphql/query and graphql/codegen). This is a companion PR for constructive#889 which introduced ad-hoc fuzzy matching in two separate files.

New matching.ts module:

• normalizeName — lowercase + strip underscores for delimiter-insensitive comparison
• normalizeNameSingular — same as above plus naive trailing 's' removal
• fuzzyFindByName<T> — generic exact-then-fuzzy lookup (replaces duplicated logic in field-selector.ts and select.ts)
• namesMatch — boolean check for whether two names refer to the same entity

New case helpers in case.ts:

• toCamelCase — like camelize but also handles hyphens
• toPascalCase — like camelize (PascalCase default) but also handles hyphens
• toScreamingSnake — camelCase/PascalCase → SCREAMING_SNAKE_CASE

These were previously copy-pasted in graphql/codegen/src/core/codegen/utils.ts.

Version bumped to 0.4.0.

Review & Testing Checklist for Human

• Unused import: matching.ts imports singularize from ./pluralize but never uses it. Confirm whether normalizeNameSingular should use proper singularize() instead of naive slice(0, -1), or remove the import. Naive stripping will fail for irregular plurals (e.g., "addresses" → "addresse" won't match "Address").
• toCamelCase vs camelize overlap: Both exist now with slightly different behavior (hyphen handling). Verify this won't confuse consumers or cause inconsistent usage across the constructive monorepo.
• Run pnpm test in packages/inflekt to confirm all 80 tests pass after merge.

Notes

• This PR is additive only — no consumers are changed yet. A follow-up PR in constructive will wire these up and remove the duplicated code.
• The fuzzy matching intentionally mirrors the exact logic from constructive#889 (naive trailing 's' strip rather than full singularize()). This keeps the behavior identical during extraction, but may warrant a follow-up to use proper singularization.

Link to Devin session: https://app.devin.ai/sessions/e3dd5ed7753043bd8d2166793364cd42
Requested by: @pyramation

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