- Capture full call stack + throw-site in the Squirrel runtime error hook
(new common/ScriptError.{h,cpp}) and surface it through ScriptException
(line/column/function/stackTrace/reported accessors).
- Runtime installs its own error hook and drives execute() with a raw
sq_call, fixing a null-deref when DevTool's hook replaces ssq's default
runtime error handler.
- Compile errors now carry source line/column plus a snippet with caret.
- REPL/MCP/Debugger eval paths return the real error text instead of
generic 'compile failed' / 'runtime failed'.
- Run() skips a second DevTool report for hook-reported script errors.
- ECS bootstrap compile/run failures are printed instead of swallowed.
Re-add test/hair.cpp and test/runtime.cpp (fixing the missing zeroerr include and enum comparisons), add graphics.resourceLifetime tests for the new release APIs, a test-source manifest check, module declared-layer check with unit tests, and a raw-string-literal regression test.
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