test: add missing tests from coverage audit; document gaps in coverage.md

- template-no-nested-interactive: add test for ignoreUsemapAttribute alias
- template-no-curly-component-invocation: add test for requireDash:true behavior
- coverage.md: document all 134 template rules with status

Author: johanrd

tests/lib/rules/template-no-curly-component-invocation.js

@@ -277,6 +277,11 @@ hbsRuleTester.run('template-no-curly-component-invocation', rule, {
       code: '{{#each items as |disallowed|}}{{disallowed}}{{/each}}',
       options: [{ disallow: ['disallowed'], noImplicitThis: false }],
     },
+    // requireDash: true — single-word names with named args are not flagged (not obviously a component)
+    {
+      code: '{{foo bar=baz}}',
+      options: [{ requireDash: true }],
+    },
   ],
   invalid: [
     {

tests/lib/rules/template-no-nested-interactive.js

@@ -54,6 +54,11 @@ ruleTester.run('template-no-nested-interactive', rule, {
     '<template><div tabindex=-1><button>Click me!</button></div></template>',
     '<template><div tabindex="1"><button></button></div></template>',
     '<template><label><input></label></template>',
+    // Config: ignoreUsemapAttribute (alias for ignoreUsemap)
+    {
+      code: '<template><button><img usemap=""></button></template>',
+      options: [{ ignoreUsemapAttribute: true }],
+    },
     '<template><details><summary>Details</summary>Something small enough to escape casual notice.</details></template>',
     '<template><details> <summary>Details</summary>Something small enough to escape casual notice.</details></template>',
     `<template>
@@ -293,6 +298,11 @@ hbsRuleTester.run('template-no-nested-interactive', rule, {
       code: '<button><img usemap=""></button>',
       options: [{ ignoreUsemap: true }],
     },
+    // Config: ignoreUsemapAttribute (alias for ignoreUsemap)
+    {
+      code: '<button><img usemap=""></button>',
+      options: [{ ignoreUsemapAttribute: true }],
+    },
   ],
   invalid: [
     {