Add feature: dolthub.com/doltgres (id: dolthub.com-doltgres)

[Copilot]

Adds a new community feature for DoltgreSQL — a version-controlled, PostgreSQL-compatible database ("Dolt for Postgres") by DoltHub.

Changes

• src/dolthub.com-doltgres/ — new feature using gh release install method
  • Downloads doltgresql-linux-{amd64|arm64}.tar.gz from dolthub/doltgresql releases
  • Extracts doltgres binary (at doltgresql-linux-{arch}/bin/doltgres, strip=2) to /usr/local/bin
  • Supports amd64 and arm64 architectures
• test/dolthub.com-doltgres/test.sh — verifies doltgres --version executes successfully
• README.md — adds table entry between diffity.com and dozzle.dev (alphabetical order)

Note: the GitHub repo is dolthub/doltgresql (full name), while the installed binary and feature ID use the shorter doltgres name.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add feature "dolthub.com/doltgres" (id dolthub.com-doltgres")</issue_title>
<issue_description>Gh repo dolthub/doltgres</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add feature "dolthub.com/doltgres" (id dolthub.com-doltgres") #188

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[sebst]

Unable to merge update latest main branch, resolve conflicts

[Copilot]

Unable to merge update latest main branch, resolve conflicts

Merged latest main and resolved the README.md conflict in commit 439f5df. Both dolthub.com (dolt, from main) and dolthub.com/doltgres are now present in alphabetical order.