AWS_S3_FORCE_PATH_STYLE environment variable is not correctly recognized

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Note: This issue was translated and drafted with the assistance of AI.

## Description

Even when the environment variable `AWS_S3_FORCE_PATH_STYLE` is set to `1` or `true`, PathStyle remains disabled.

## Version

3.0.4

## Root Cause

In `bin/cdklocal`, the `shouldForcePathStyle` function passes the *value* of the environment variable to `isEnvTrue` instead of the *variable name*.
Since `isEnvTrue` in `src/index.js` performs a lookup using the provided argument as a key for `process.env`, it fails to find the correct value.

bin/cdklocal
```js
const shouldForcePathStyle = () => {
// It currently passes the value (e.g., "1" or "true") instead of the key name
if (isEnvTrue(process.env.AWS_S3_FORCE_PATH_STYLE)) {
return true;
}
const endpointUrl = process.env.AWS_ENDPOINT_URL || "";
try {
return new URL(endpointUrl).hostname.includes(".sandbox.");
} catch {
return false;
}
};
```

src/index.js
```js
const isEnvTrue = (envName) => ["1", "true"].includes(process.env[envName]);
```

Start by reading shouldForcePathStyle in bin/cdklocal and the isEnvTrue helper in src/index.js. Verify how AWS_S3_FORCE_PATH_STYLE values of 1 and true are looked up, then confirm that enabling the variable makes PathStyle active without changing the existing endpoint hostname behavior.

Written by the indexing model from the issue text.