Reland "refactor(core): cleanup feature flags for js source inclusion" (#19519)

Relands #19463. This time the `ExtensionFileSourceCode` enum is
preserved, so this effectively just splits feature
`include_js_for_snapshotting` into `exclude_js_sources` and
`runtime_js_sources`, adds a `force_include_js_sources` option on
`extension!()`, and unifies `ext::Init_ops_and_esm()` and
`ext::init_ops()` into `ext::init()`.

1 files changed, 7 insertions, 0 deletions

diff --git a/core/01_core.js b/core/01_core.js
index d4a6508cb..44da702ad 100644
--- a/core/01_core.js
+++ b/core/01_core.js
@@ -38,6 +38,13 @@
     URIError,
     setQueueMicrotask,
   } = window.__bootstrap.primordials;
+
+  const key = SymbolFor("01_core.js");
+  if (globalThis.__bootstrap[key]) {
+    return;
+  }
+  globalThis.__bootstrap[key] = true;
+
   const { ops, asyncOps } = window.Deno.core;
 
   const build = {