Signed-off-by: Sascha Greuel <github@1-2.dev>

Signed-off-by: Sascha Greuel <github@1-2.dev>

- Rebuilt the test suite from scratch: removed bulky baseline fixtures and added compact unit/integration coverage for every filter (index, union, query, recursive, slice), lexer edge cases, and JSONPath core helpers. Runs reflection-free and deprecation-free.
- Achieved and enforced 100% code coverage across AccessHelper, all filters, lexer, tokens, and JSONPath core while keeping phpstan and coding standards clean.
- Added a lightweight manual query runner with curated examples to exercise selectors quickly without external datasets.
- Major compatibility push toward the unofficial JSONPath standard: unions support slices/queries/wildcards, trailing commas parse correctly, negative indexes and bracket-escaped keys (quotes, brackets, wildcards, special chars) are honored, filters compare path-to-path and root references, equality/deep-equality/regex/in/nin semantics align with expectations, and null existence/value handling follows RFC behavior.
- New feature highlights from this cycle:
  - Multi-key unions with and without quotes: `$[name,year]` and `$["name","year"]`.
  - Robust bracket notation for special/escaped keys, including `']'`, `'*'`, `$`, backslashes, and mixed punctuation.
  - Trailing comma support in unions/slices (e.g. `$..books[0,1,2,]`).
  - Negative index handling aligned with spec (short arrays return empty; -1 works where valid).
  - Filter improvements: path-to-path/root comparisons, deep equality across scalars/objects/arrays/null/empties, regex matching, `in`/`nin`/`!in`, tautological expressions, and `?@` existence behavior per RFC.
  - Unions combining slices/queries/wildcards now return complete results (e.g. `$[1:3,4]`, `$[*,1]`).

This fixes #72, fixes #61, fixes #60, fixes #59, fixes #58, fixes #51, fixes #44, fixes #41, fixes #40, fixes #39, fixes #38, fixes #37, fixes #36, fixes #35, fixes #34, fixes #33, fixes #32, fixes #31, fixes #30, fixes #29, fixes #9, closes #3

Signed-off-by: Sascha Greuel <github@1-2.dev>

…te: JSON documents are now decoded as objects to preserve `{}` vs `[]`, unsupported selectors no longer abort the runner, and dot-notation now accepts quoted keys with dots/spaces/leading `@`.

- Hardened filter parsing: boolean-only filters (`?(true|false|null)`), literal short-circuiting (`&& false`, `|| true`), and empty filters now return the expected collections instead of throwing.
- Slice filters gracefully skip non-countable objects.

Signed-off-by: Sascha Greuel <github@1-2.dev>

…terals like `['[$the.size$]']` remain atomic and do not split into root tokens.

Signed-off-by: Sascha Greuel <github@1-2.dev>