fix: add lint rule for focused tests (#2901)

Please provide a paragraph or two giving a summary of the change,
including relevant motivation and context.

# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
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- [ ] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [ ] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [ ] Every change is related to the PR description.
- [ ] I have
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this pull request to relevant issues (if any exist).

yarn-project/foundation/.eslintrc.cjs

@@ -52,7 +52,7 @@ module.exports = {
   },
   root: true,
   parser: '@typescript-eslint/parser',
-  plugins: ['@typescript-eslint', 'eslint-plugin-tsdoc', 'jsdoc'],
+  plugins: ['@typescript-eslint', 'eslint-plugin-tsdoc', 'jsdoc', 'no-only-tests'],
   overrides: [
     {
       files: ['*.ts', '*.tsx'],
@@ -129,6 +129,8 @@ module.exports = {
     'jsdoc/require-property-description': [JSDOC_RULES_LEVEL, { contexts }],
     'jsdoc/require-property-name': [JSDOC_RULES_LEVEL, { contexts }],
     'jsdoc/require-returns': 'off',
+    // this unfortunately doesn't block `fit` and `fdescribe`
+    'no-only-tests/no-only-tests': ['error'],
   },
   ignorePatterns: ['node_modules', 'dest*', 'dist', '*.js', '.eslintrc.cjs'],
 };

yarn-project/foundation/package.json

@@ -95,6 +95,7 @@
     "eslint": "^8.21.0",
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-jsdoc": "^40.1.0",
+    "eslint-plugin-no-only-tests": "^3.1.0",
     "eslint-plugin-tsdoc": "^0.2.17",
     "jest": "^29.5.0",
     "prettier": "^2.7.1",

yarn-project/yarn.lock

@@ -488,6 +488,7 @@ __metadata:
     eslint: ^8.21.0
     eslint-config-prettier: ^8.5.0
     eslint-plugin-jsdoc: ^40.1.0
+    eslint-plugin-no-only-tests: ^3.1.0
     eslint-plugin-tsdoc: ^0.2.17
     hash.js: ^1.1.7
     jest: ^29.5.0
@@ -9417,6 +9418,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"eslint-plugin-no-only-tests@npm:^3.1.0":
+  version: 3.1.0
+  resolution: "eslint-plugin-no-only-tests@npm:3.1.0"
+  checksum: 2a5de82f3a732dbd46792661dd0f8546cf819f76d8828968166dee35741e8039904ba473dafe1eed585f401a496d260c2c38354bb887c94bd4ced0ddca00fb62
+  languageName: node
+  linkType: hard
+
 "eslint-plugin-react-hooks@npm:^4.6.0":
   version: 4.6.0
   resolution: "eslint-plugin-react-hooks@npm:4.6.0"