feat(cli.ts, commit.ts): add --yes flag to skip commit confirmation prompt (#341)

docs(README.md): document the `--yes` flag usage in README for user guidance

src/cli.ts

@@ -18,7 +18,13 @@ cli(
     name: 'opencommit',
     commands: [configCommand, hookCommand, commitlintConfigCommand],
     flags: {
-      fgm: Boolean
+      fgm: Boolean,
+      yes: {
+        type: Boolean,
+        alias: 'y',
+        description: 'Skip commit confirmation prompt',
+        default: false
+      }
     },
     ignoreArgv: (type) => type === 'unknown-flag' || type === 'argument',
     help: { description: packageJSON.description }
@@ -29,7 +35,7 @@ cli(
     if (await isHookCalled()) {
       prepareCommitMessageHook();
     } else {
-      commit(extraArgs, false, flags.fgm);
+      commit(extraArgs, false, flags.fgm, flags.yes);
     }
   },
   extraArgs