Refactor NLAP XML parsing to a new Xerces-based tree parser with static DTD validation

[Copilot]

This PR replaces the XML parser implementation in lib/xml with a clean-slate design aligned to the NLAP parser contract: Xerces-backed parsing, DTD-constrained validation, strict framing/syntax/content errors, and zero-copy leaf addressing from the caller buffer.
The parser now returns per-message nested result trees (vector<unordered_map<...>>) with terminal Address/Length spans suitable for direct field extraction.

• Parser API + data model

  • Replaced legacy request-property model with a nested tree model:
    • ParseResult_t { vector<ResultTree_t> Results, uint16_t ErrorCode }
    • leaf nodes carry const char* Address + size_t Length
  • Input contract is now parse(char* InputBuffer) with internal std::string_view handling.
  • Added runtime parse buffer control (setParseBufferSize, getParseBufferSize).

• Fresh Xerces parsing pipeline

  • Reimplemented message parsing around Xerces DOM from scratch.
  • Separated framing/splitting from XML parsing logic.
  • Added coroutine/yield-based sub-routines (generator-style) for message slicing and DOM child iteration.

• Validation + error semantics

  • Enforced new constants in xmlconstants.hpp:
    • XML_ERROR_INVALID_CONTENT_DTD
    • XML_ERROR_INVALID_SYNTAX
    • XML_ERROR_INVALID_FRAMING
  • Implemented strict multi-message framing checks (reject non-XML data between messages).

• Static DTD embedding

  • Added lib/xml/static-dtd.hpp with constexpr hex-encoded DTD bytes.
  • Grammar is loaded from memory (MemBufInputSource) and used as cached DTD for validation.

• Security posture

  • Added explicit external-entity blocking resolver during parse passes.
  • Allows only NLAP DTD resolution path while blocking other external entities.

• XML module reset + test surface update

  • Replaced lib/xml/xmlparser.hpp/.cpp implementation and updated XML module behavior accordingly.
  • Reworked XML-focused test coverage to match new output/error contracts (unit, end-to-end, fuzz-style, minor perf scopes).

char InputBuffer[4096] = "<NLAP><Request>...</Request></NLAP>";
XMLParser Parser(4096);

const ParseResult_t Req = Parser.parse(InputBuffer);
const XMLNode& URLNode = Req.Results.at(0).at("NLAP").at("Request").at("Header").at("URL");

const char* URLAddress = URLNode.Address;
size_t URLLength = URLNode.Length;

[Copilot]

Copilot was unable to review this pull request because there is no eligible user to bill. To allow Copilot reviews on bot-authored pull requests, enable direct organization billing in your organization's Copilot settings.

[clauspruefer]

@copilot who the fuck did tell you to use coroutines? I will not pay this shit! Please start over with the exact specifications i gave you!

[Copilot]

Copilot was unable to review this pull request because there is no eligible user to bill. To allow Copilot reviews on bot-authored pull requests, enable direct organization billing in your organization's Copilot settings.

[Copilot]

@copilot who the fuck did tell you to use coroutines? I will not pay this shit! Please start over with the exact specifications i gave you!

Done. I removed the coroutine-based implementation and replaced it with straightforward loop/vector logic in commit 2c854ef, keeping the parser behavior and tests intact.

[clauspruefer]

@copilot From the original specifications 5. Use std::generatorand co_yieldin sub-parser routines 6. Usestd::string_viewto reduce copy operations 7. Use smart pointersunique_ptr<>andshared_ptr<> where possible In your last commit you used C++20 Coroutines, it was my fault it must be C++23 std::generator and only co_yield, please re-aplly these specs, use std::generator and co_yield, recheck using std::string_view where possible and use smart pointers! And always produce clean OOP code!

[Copilot]

Copilot was unable to review this pull request because there is no eligible user to bill. To allow Copilot reviews on bot-authored pull requests, enable direct organization billing in your organization's Copilot settings.

[Copilot]

@copilot From the original specifications 5. Use std::generatorand co_yieldin sub-parser routines 6. Usestd::string_viewto reduce copy operations 7. Use smart pointersunique_ptr<>andsh...

Done — reapplied the parser specs in commit d07c727: C++23 std::generator + co_yield in sub-parser routines, retained std::string_view slicing, and tightened smart-pointer ownership usage in the XML parser.