This takes the code that was previously in src/Compilation.zig to turn resinator diagnostics into Zig error bundles and puts it in resinator/main.zig, and then makes resinator emit the resulting error bundles via std.zig.Server (which is used by the build runner, etc). Also adds support for turning Aro diagnostics into ErrorBundles.
This moves .rc/.manifest compilation out of the main Zig binary, contributing towards #19063
Also:
- Make resinator use Aro as its preprocessor instead of clang
- Sync resinator with upstream
