Fix deprecation warning on PHP 8.5

Signed-off-by: Sascha Greuel <[email protected]>

Signed-off-by: Sascha Greuel <[email protected]>

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

Signed-off-by: Sascha Greuel <[email protected]>

…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 <[email protected]>

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

Signed-off-by: Sascha Greuel <[email protected]>

….6 support

Signed-off-by: Sascha Greuel <[email protected]>

- Added the RFC 9535 `length()`, `count()`, `match()`, `search()`, and `value()` function extensions.
- Added a dedicated expression parser and static type checker for function expressions; malformed and ill-typed expressions are rejected without evaluating user-controlled PHP code.
- Added checked RFC 9485 I-Regexp support for full-string and substring matching, with PCRE resource limits.

Signed-off-by: Sascha Greuel <[email protected]>