refactor: refactor file pattern handling in generator functions

- Modify the logic for adding wildcard characters to both directory and non-directory file patterns in the `lineOfFileGenerator` function.
- Refactor the process of adding exclamation point prefix in ignored file patterns in the `getFilePatterns` function.
- Change and simplify the method of appending the wildcard characters to paths in the `getFilePatterns` function.

src/utils.ts

@@ -176,10 +176,11 @@ async function* lineOfFileGenerator({
       if (excludedFiles) {
         line = line.startsWith('!') ? line : `!${line}`
         if (line.endsWith(path.sep)) {
-          line = `${line}${path.sep}**`
+          line = `${line}**`
         }
         yield line
       } else {
+        line = line.endsWith(path.sep) ? `${line}**` : line
         yield line
       }
     }
@@ -998,6 +999,7 @@ export const getFilePatterns = async ({
   if (inputs.files) {
     const filesPatterns = inputs.files
       .split(inputs.filesSeparator)
+      .map(p => (p.endsWith(path.sep) ? `${p}**` : p))
       .filter(Boolean)
 
     cleanedFilePatterns.push(...filesPatterns)
@@ -1029,11 +1031,9 @@ export const getFilePatterns = async ({
       .split(inputs.filesIgnoreSeparator)
       .filter(Boolean)
       .map(p => {
-        if (!p.startsWith('!')) {
-          p = `!${p}`
-        }
+        p = p.startsWith('!') ? p : `!${p}`
         if (p.endsWith(path.sep)) {
-          p = `${p}${path.sep}**`
+          p = `${p}**`
         }
         return p
       })