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>

2 files changed, 16 insertions, 0 deletions

diff --git a/tests/specs/npm/deno_cache/__test__.jsonc b/tests/specs/npm/deno_cache/__test__.jsonc
new file mode 100644
index 000000000..93b204c03
--- /dev/null
+++ b/tests/specs/npm/deno_cache/__test__.jsonc
@@ -0,0 +1,8 @@
+{
+  "args": "cache --reload npm:chalk npm:mkdirp",
+  "output": "deno_cache.out",
+  "envs": {
+    "NO_COLOR": "1",
+    "NPM_CONFIG_REGISTRY": "http://localhost:4260/"
+  }
+}
diff --git a/tests/specs/npm/deno_cache/deno_cache.out b/tests/specs/npm/deno_cache/deno_cache.out
new file mode 100644
index 000000000..d723293a8
--- /dev/null
+++ b/tests/specs/npm/deno_cache/deno_cache.out
@@ -0,0 +1,8 @@
+[UNORDERED_START]
+Download http://localhost:4260/chalk
+Download http://localhost:4260/mkdirp
+[UNORDERED_END]
+[UNORDERED_START]
+Download http://localhost:4260/chalk/chalk-5.0.1.tgz
+Download http://localhost:4260/mkdirp/mkdirp-1.0.4.tgz
+[UNORDERED_END]