Rule produces false positives very frequently

[RoystonS]

Lots of valid commit messages are rejected incorrectly:

• Reduce duplication in codebase - this is incorrectly flagged as past tense because the word 'Reduce' contains the letters 'ed'. I presume the code is attempting to detect words ending 'ed', but the regex is matching words that contain 'ed'.
• Add missing directive to foobar - this is incorrectly flagged as a gerund because the word 'missing' (which isn't a verb) ends 'ing'. Adjectives like 'missing' or nouns like 'warning' occur quite frequently in commit messages, so checking anything other than the first word in the commit produces a lot of false positives.
• Fix compiler warnings in foobar - this is incorrectly flagged as a gerund because the word 'warning' contains the letters 'ing'.

[AndreMarquesDev]

Managed to fix it by basically just forking the logic from https://github.com/ngx-devs/commitlint-plugin-imperative/blob/main/src/rules.ts and applying the plugin locally.

So before I had it like this:

// commitlint.config.ts

const Configuration: UserConfig = {
  ...
  rules: {
    ...
    'imperative-rule/en': [RuleConfigSeverity.Error, 'always'],
  },
  plugins: ['@ngx-devs/commitlint-plugin-imperative'],
};

export default Configuration;

And I improved the regex to check only the last letters from the word and only the first word after the commit type:

// commitlint.config.ts

const Configuration: UserConfig = {
  ...
  rules: {
    ...
    'subject-imperative': [RuleConfigSeverity.Error, 'always'],
  },
  plugins: [
    {
      rules: {
        // inspired by https://github.com/ngx-devs/commitlint-plugin-imperative
        'subject-imperative': ({ subject }) => {
          const subjectFirstWord = subject?.trim().split(' ')[0] ?? '';
          const pastTenseRegex = /\b\w+ed\b/;
          const gerundRegex = /((\w)*(ing))/;
          const pastTenseErrorMessage = `The word "${subjectFirstWord}" is in the past tense. Please use the imperative form. More info at https://github.com/ngx-devs/commitlint-plugin-imperative`;
          const gerundErrorMessage = `The word "${subjectFirstWord}" is in the gerund. Please use the imperative form. More info at https://github.com/ngx-devs/commitlint-plugin-imperative`;

          const isInPastTense = pastTenseRegex.test(subjectFirstWord);
          if (isInPastTense) {
            return [false, pastTenseErrorMessage];
          }

          const isInGerund = gerundRegex.test(subjectFirstWord);
          if (isInGerund) {
            return [false, gerundErrorMessage];
          }

          return [true];
        },
      },
    },
  ]
};

export default Configuration;

Also cleaned up the code a little bit and renamed the rule to subject-imperative.