fix(unplugin-vue-i18n): don't analyze identifiers in vue files when using `pug/jsx/tsx` languages

[userquin]

This PR includes the following changes in the directives plugin:

• exclude analyze identifiers when vue files using any of the following languages: pug, jsx and tsx (we cannot parse those languages with @typescript-eslint/typescript-estree)
• adds a new excludeLangs array containing previous languages to allow add more when required
• small refactor for perfomance

This PR doesn't fix anything about v-t logic in the directives plugin: v-t cannot be used (ignored/error?)

resolves #402

[kazupon]

Thanks!

This PR doesn't fix anything about v-t logic in the directives plugin: v-t cannot be used (ignored/error?)

This PR cannot solve the root issue of #402, but as a workaround, this PR is effective. This PR will allow us to build it so it will no longer be blocked. So I would like to merge it and release it as a patch.

By the way, solving the root cause of #402 will take some time. I have a conference talk coming up at the end of this month, so it will be some time before I can resolve that.