feat: Expand 'imports' section of deno.json (#22087)

This commit adds automatic expansion of "imports" field in "deno.json"
file.

If "npm:" or "jsr:" imports are encountered we automatically try to add
a "directory" remapping.

Previously users had to specify entries for both `foo` and `foo/` to be
able to import like
`import { symbol1 } from "foo";` and `import { symbol2 } from
"foo/some_file.js"`:
```
{
  "imports": {
    "foo": "npm:@foo/bar",
    "foo/": "npm:/@foo/bar/",
}
```

With this change users can only add entry for `foo`:
```
{
  "imports": {
    "foo": "npm:@foo/bar",
}
```
The entry for `foo/` will be provided automatically.

Similarly if user provides "directory" remapping explicitly, we will not
overwrite it.

1 files changed, 1 insertions, 1 deletions

diff --git a/cli/tests/testdata/package_json/basic/main.info.out b/cli/tests/testdata/package_json/basic/main.info.out
index b283a0ee0..892c0612a 100644
--- a/cli/tests/testdata/package_json/basic/main.info.out
+++ b/cli/tests/testdata/package_json/basic/main.info.out
@@ -5,4 +5,4 @@ size: [WILDCARD]
 
 file:///[WILDCARD]/main.ts (63B)
 └─┬ file:///[WILDCARD]/lib.ts (166B)
-  └── npm:/@denotest/esm-basic@1.0.0 (416B)
+  └── npm:/@denotest/esm-basic@1.0.0 (471B)