chore(*): organise rules into folders by type

src/rules/path/lowerCaseFileNames.ts

@@ -0,0 +1,32 @@
+import { PathLintRule } from '../../types/LintRule'
+import { LintRuleType } from '../../types/LintRuleType'
+import { Severity } from '../../types/Severity'
+import path from 'path'
+
+const name = 'lowerCaseFileNames'
+const description = 'Enforce the use of lower case file names.'
+const message = 'File name contains uppercase characters'
+const test = (value: string) => {
+  const fileName = path.basename(value)
+  if (fileName.toLocaleLowerCase() === fileName) return []
+  return [
+    {
+      message,
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    }
+  ]
+}
+
+/**
+ * Lint rule that checks for the absence of uppercase characters in a given file name.
+ */
+export const lowerCaseFileNames: PathLintRule = {
+  type: LintRuleType.Path,
+  name,
+  description,
+  message,
+  test
+}