Adds a search field to the Task Templates page so users can filter templates in the current view.

[jbarcia2019]

Changes

• Adds a search input to the task templates toolbar.
• Filters templates locally by name, playbook, description, inventory, repository, and variable groups.
• Adds English and Spanish translations for the search label.

Testing

• Ran git diff --check.
• Built successfully through the local Docker image build.

[jbarcia2019]

The failing check appears unrelated to this PR.

The Add PRO implementation step in .github/workflows/dev.yml clones semaphoreui/semaphorepro-module using secrets.GH_TOKEN. Since this PR comes from a fork, GitHub Actions does not expose repository
secrets to the pull_request workflow, so the clone fails with exit code 128.

The change itself only touches the task templates page search UI and translations.

@fiftin