Fixes devcontainer-feature.json with comment

[hellodword]

1. formated via yarn format

node ➜ /workspaces/devcontainer-action (main) $ yarn format-check
yarn run v1.22.19
$ prettier --check '**/*.ts'
Checking formatting...
[warn] src/contracts/collection.ts
[warn] src/generateDocs.ts
[warn] src/main.ts
[warn] Code style issues found in 3 files. Forgot to run Prettier?
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

node ➜ /workspaces/devcontainer-action (main) $ yarn format
yarn run v1.22.19
$ prettier --write '**/*.ts'
__tests__/main.test.ts 133ms
__tests__/validateSchema.test.ts 16ms
src/contracts/collection.ts 9ms
src/contracts/features.ts 6ms
src/contracts/templates.ts 4ms
src/generateDocs.ts 33ms
src/main.ts 34ms
src/utils.ts 25ms
Done in 0.46s.

2. remove the dependencies which're not been used by any scripts in the package.json.
3. fixes Validate fails with comments #210 and add some test cases.

[hellodword]

@microsoft-github-policy-service agree

[samruddhikhandale]

Looks great, thanks for the quick fix! 🎉

Tested the action locally, works great.

[Annie602942]

hiddify/hiddify-app#1205