Split bundler up into multiple files (#20192)

src/bundler/linker_context/postProcessHTMLChunk.zig

@@ -0,0 +1,36 @@
+pub fn postProcessHTMLChunk(ctx: GenerateChunkCtx, worker: *ThreadPool.Worker, chunk: *Chunk) !void {
+    // This is where we split output into pieces
+    const c = ctx.c;
+    var j = StringJoiner{
+        .allocator = worker.allocator,
+        .watcher = .{
+            .input = chunk.unique_key,
+        },
+    };
+
+    const compile_results = chunk.compile_results_for_chunk;
+
+    for (compile_results) |compile_result| {
+        j.push(compile_result.code(), bun.default_allocator);
+    }
+
+    j.ensureNewlineAtEnd();
+
+    chunk.intermediate_output = c.breakOutputIntoPieces(
+        worker.allocator,
+        &j,
+        @as(u32, @truncate(ctx.chunks.len)),
+    ) catch bun.outOfMemory();
+
+    chunk.isolated_hash = c.generateIsolatedHash(chunk);
+}
+
+const bun = @import("bun");
+const LinkerContext = bun.bundle_v2.LinkerContext;
+
+const Chunk = bun.bundle_v2.Chunk;
+
+const GenerateChunkCtx = bun.bundle_v2.LinkerContext.GenerateChunkCtx;
+const ThreadPool = bun.bundle_v2.ThreadPool;
+
+const StringJoiner = bun.StringJoiner;