Add TypeScript antipattern detection

[mrtwebdesign]

Summary

WP-Code-Check currently includes .ts and .tsx in file_patterns for its JS/Node.js/headless pattern categories, but all checks are language-agnostic security and reliability patterns. There are zero TypeScript-specific checks today.

Problem

TypeScript projects have a class of common antipatterns that suppress or circumvent the type system. These are detectable with grep and don't require AST analysis, making them a natural fit for WPCC's zero-dependency design.

Proposed grep-feasible TypeScript checks

Antipattern	Grep pattern	Why it matters
@ts-ignore	@ts-ignore	Silences type errors without fixing them
@ts-nocheck	@ts-nocheck	Disables type checking for entire file
@ts-expect-error (without comment)	@ts-expect-error\s*$	Suppression without explanation
as any	as\s+any	Unsafe type assertion, defeats type safety
<any> type assertion	<any>	Legacy syntax for the same problem
: any type annotation	:\s*any\b	Explicit opt-out of type safety
// eslint-disable (broad)	eslint-disable(?!-next-line)	File-wide lint suppression
Non-null assertion abuse	\w+!\. or \w+!\[	Overrides null safety checks

Checks that are NOT feasible with grep

These require tsc or @typescript-eslint and are out of scope:

• Implicit any (missing annotations where inference fails)
• Missing return types on exported functions
• Unsafe generic usage
• strictNullChecks compliance
• Unused type imports

Suggested implementation

• New pattern category: typescript (or extend existing nodejs category)
• New pattern files: ts-001-type-suppression.json, ts-002-unsafe-any.json, etc.
• file_patterns: ["*.ts", "*.tsx"] only (not .js)
• Severity: advisory/warning — these are code smells, not always bugs

Acceptance criteria

• At least 3-4 new TypeScript-specific pattern definitions
• Patterns target .ts/.tsx files only
• wpcc --features lists the new patterns
• Scans produce actionable findings with clear descriptions
• PATTERN-LIBRARY.json updated with new category/patterns

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