Function existsFile

existsFile(filePath: string): Promise<boolean>
Checks if a file exists at the specified path.
Parameters
- filePath: string
  The path to the file to check
Returns Promise<boolean>
A promise that resolves to true if the file exists, false otherwise
Example
Check if a file exists:
```
const exists = await existsFile('path/to/file.txt');
if (exists) {
  console.log('File found!');
}
```
Example
Use in conditional logic:
```
if (await existsFile(errorFilePath)) {
  await fsa.rm(errorFilePath);
}
```
- Defined in filesystem.ts:30