[linter] Review linter setup (#3783)

- [2b395b9f] Fix command to lint markdown in `CONTRIBUTING.md`
- [fed4c86c] Re-activate JSDoc ESLint plugin and fix linting issues (As
far as I remember, we deactivated it when we upgraded to ESLint 9
because it was not compatible with it. But its now.)
- [a3d2064b] Refactor ESLint config to use `defineConfig` and
`globalIgnores` ([these are like new
defaults](https://eslint.org/blog/2025/03/flat-config-extends-define-config-global-ignores/))
- [a3d2064b] Replace `eslint-plugin-import` with
`eslint-plugin-import-x`
(https://github.com/es-tooling/module-replacements/blob/main/docs/modules/eslint-plugin-import.md)
- [86a185b6] Switch Stylelint config to flat format and simplify
Stylelint scripts (like we already did for ESLint and prettier)
  - [f5a2c541] Fix some typos

tests/electron/modules/compliments_spec.js

@@ -5,6 +5,7 @@ describe("Compliments module", () => {
 	/**
 	 * move similar tests in function doTest
 	 * @param {Array} complimentsArray The array of compliments.
+	 * @param {string} state The state of the element (e.g., "visible" or "attached").
 	 * @returns {boolean} result
 	 */
 	const doTest = async (complimentsArray, state = "visible") => {
@@ -35,7 +36,7 @@ describe("Compliments module", () => {
 			await expect(doTest(["Hello There", "Good Evening", "Evening test"])).resolves.toBe(true);
 		});
 
-		it("doesnt show evening compliments during the day when the other parts of day are not set", async () => {
+		it("doesn't show evening compliments during the day when the other parts of day are not set", async () => {
 			await helpers.startApplication("tests/configs/modules/compliments/compliments_evening.js", "01 Oct 2022 08:00:00 GMT");
 			await expect(doTest([""], "attached")).resolves.toBe(true);
 		});