Improve: Move directory name into General tab in Directory Builder

[RabbiIslamRony]

PR Type

What kind of change does this PR introduce?

• Bugfix
• Security fix
• Improvement
• New Feature
• Refactoring (no functional changes, no api changes)
• Build related changes
• Text changes
• Other... Please describe:

Description

Moves the editable directory name from the page header into the General tab of the Directory Builder as a proper form field. The header now shows the name as a read-only label. https://prnt.sc/oGc1_GertBzV

Why: The old inline-editable name in the header looked like a static page title — many users never discovered they could click it to rename. Placing it inside the General tab with a label, description, and standard text input makes it immediately obvious and consistent with every other setting.

How to test

1. Go to Directory Builder → Edit any directory type (e.g. "Business").
2. Confirm the General tab now shows a "Directory name" section as the first field with the current name pre-filled.
3. Change the name in the input, click Update, and verify:
   • The header label updates to reflect the new name.
   • The directory is saved with the new name (check the term in the database or revisit the page).
4. Confirm the header name text is non-interactive (no pointer cursor, no click-to-edit).
5. Create a new directory type and verify the name field appears empty with placeholder text.

Any linked issues

Fixes #

Checklist

• My code follows the WordPress coding standards

[RabbiIslamRony]

@rafizsejim Suggested by @devShamim — moved the directory name into the General tab for better discoverability.