feat: add `--allow-import` flag (#25469)

This replaces `--allow-net` for import permissions and makes the
security sandbox stricter by also checking permissions for statically
analyzable imports.

By default, this has a value of
`--allow-import=deno.land:443,jsr.io:443,esm.sh:443,raw.githubusercontent.com:443,gist.githubusercontent.com:443`,
but that can be overridden by providing a different set of hosts.

Additionally, when no value is provided, import permissions are inferred
from the CLI arguments so the following works because
`fresh.deno.dev:443` will be added to the list of allowed imports:

```ts
deno run -A -r https://fresh.deno.dev
```

---------

Co-authored-by: David Sherret <dsherret@gmail.com>

3 files changed, 18 insertions, 0 deletions

diff --git a/tests/specs/npm/cjs_module_export_assignment_number/__test__.jsonc b/tests/specs/npm/cjs_module_export_assignment_number/__test__.jsonc
new file mode 100644
index 000000000..d70f82e50
--- /dev/null
+++ b/tests/specs/npm/cjs_module_export_assignment_number/__test__.jsonc
@@ -0,0 +1,8 @@
+{
+  "args": "run -A --quiet --check=all cjs_module_export_assignment_number/main.ts",
+  "output": "cjs_module_export_assignment_number/main.out",
+  "envs": {
+    "NO_COLOR": "1",
+    "NPM_CONFIG_REGISTRY": "http://localhost:4260/"
+  }
+}
diff --git a/tests/specs/npm/cjs_module_export_assignment_number/cjs_module_export_assignment_number/main.out b/tests/specs/npm/cjs_module_export_assignment_number/cjs_module_export_assignment_number/main.out
new file mode 100644
index 000000000..e559775cf
--- /dev/null
+++ b/tests/specs/npm/cjs_module_export_assignment_number/cjs_module_export_assignment_number/main.out
@@ -0,0 +1,3 @@
+5
+5
+[Module: null prototype] { default: 5 }
diff --git a/tests/specs/npm/cjs_module_export_assignment_number/cjs_module_export_assignment_number/main.ts b/tests/specs/npm/cjs_module_export_assignment_number/cjs_module_export_assignment_number/main.ts
new file mode 100644
index 000000000..aee24bf19
--- /dev/null
+++ b/tests/specs/npm/cjs_module_export_assignment_number/cjs_module_export_assignment_number/main.ts
@@ -0,0 +1,7 @@
+import defaultImport, * as namespaceImport from "npm:@denotest/cjs-module-export-assignment-number";
+
+const testDefault: 5 = defaultImport;
+console.log(testDefault);
+const testNamespace: 5 = namespaceImport.default;
+console.log(testNamespace);
+console.log(namespaceImport);