Misc small fixes (#897)

- **Eliminate `<regex>` usage** — Replaced `std::regex`-based URL parsing in `jupiterbuildstorage.cpp` with manual `string_view` parsing. Added `CXXOPTS_NO_REGEX` to disable regex in cxxopts. Includes comprehensive tests for the new URL parser.
- **Add missing HTTP response codes** — Added `102`, `103`, `203`, `207`, `208`, `226`, `306`, `421`, `425`, `451` to the enum and reason string lookup.
- **Add `ForceColor` support to zen CLI** — Plumbed the `ForceColor` logging option through to the zen client.
- **Add `.clangd` config** — Strips MSVC-specific flags clangd can't handle and suppresses noisy clang-tidy checks.
- **Generic `fmt::formatter` for `ToString`** — Concept-based formatter that auto-formats any type with a free `ToString()` function, removing the need for per-type specializations.
- **Fix OpenSSL dependency** — Changed `zenhorde` to use `openssl3` package on Linux/macOS.
- **Add `<cmath>` include** — Missing include in `hyperloglog.h`.
- **GCC compile fix** — Moved `static constinit` variable inside lambda in `logging.cpp`.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/zenhttp/httpserver.cpp b/src/zenhttp/httpserver.cpp
index 9fc42f18c..e05c9815f 100644
--- a/src/zenhttp/httpserver.cpp
+++ b/src/zenhttp/httpserver.cpp
@@ -329,6 +329,10 @@ ReasonStringForHttpResultCode(int HttpCode)
 			return "Continue"sv;
 		case 101:
 			return "Switching Protocols"sv;
+		case 102:
+			return "Processing"sv;
+		case 103:
+			return "Early Hints"sv;
 
 			// 2xx Success
 
@@ -338,12 +342,20 @@ ReasonStringForHttpResultCode(int HttpCode)
 			return "Created"sv;
 		case 202:
 			return "Accepted"sv;
+		case 203:
+			return "Non-Authoritative Information"sv;
 		case 204:
 			return "No Content"sv;
 		case 205:
 			return "Reset Content"sv;
 		case 206:
 			return "Partial Content"sv;
+		case 207:
+			return "Multi-Status"sv;
+		case 208:
+			return "Already Reported"sv;
+		case 226:
+			return "IM Used"sv;
 
 			// 3xx Redirection
 
@@ -424,6 +436,8 @@ ReasonStringForHttpResultCode(int HttpCode)
 			return "Too Many Requests"sv;
 		case 431:
 			return "Request Header Fields Too Large"sv;
+		case 451:
+			return "Unavailable For Legal Reasons"sv;
 
 			// 5xx Server errors