feat: add EsFormTextarea v3

[hroth1994]

🔗 Linked issue

https://energysage.atlassian.net/browse/CED-1758

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Adds molecule EsFormTextarea based off of existing implementation that uses HTML element textarea. I initially tried using PrimeVue's Textarea component but the unstyled mode is essentially the same as textarea.

🥼 Testing

Tested locally at http://localhost:8500/molecules/form-textarea ensuring the entered value propagates across all input fields, excluding the success state fields which have their own message

🧐 Feedback Requested / Focus Areas

• A few things to note:
• I tried v-bind="$attrs" but ended up using modelValue when that worked with neither Textarea nor textarea
• hover, active, and focus pseudo-classes match existing implementation rather than ESDS 2.0 design
• border width matches design, not existing implementation (existing: .556px, ESDS 2.0 design: 1px)

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.
• I have documented testing approach

[swarmia]

✅  Linked to Task CED-1758 · Create EsFormTextarea using PrimeVue
➡️  Part of Epic CED-1339 · Build Vue 3 design system [LC]

[nathanielwarner]

👀

[nathanielwarner]

Looks pretty good! Just a cleanup and a fix.

[nathanielwarner]

Looks good! Just the one nit.