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>

1 files changed, 9 insertions, 2 deletions

diff --git a/tests/specs/publish/missing_constraint_jsx_import_source/mod.out b/tests/specs/publish/missing_constraint_jsx_import_source/mod.out
index d1da06be8..fa06d8c38 100644
--- a/tests/specs/publish/missing_constraint_jsx_import_source/mod.out
+++ b/tests/specs/publish/missing_constraint_jsx_import_source/mod.out
@@ -1,6 +1,13 @@
-[WILDCARD]
+[UNORDERED_START]
+Download http://localhost:4260/preact
+Download http://localhost:4260/preact-render-to-string
+Download http://localhost:4260/pretty-format
+Download http://localhost:4260/preact-render-to-string/preact-render-to-string-6.4.0.tgz
+Download http://localhost:4260/preact/preact-10.19.6.tgz
+Download http://localhost:4260/pretty-format/pretty-format-3.8.0.tgz
+[UNORDERED_END]
+Check file:///[WILDLINE]/mod.ts
 Checking for slow types in the public API...
-Check file:///[WILDCARD]/mod.ts
 error[missing-constraint]: specifier 'npm:preact/jsx-runtime' is missing a version constraint
  --> [WILDLINE]
   = hint: specify a version constraint for the specifier