Governance Showcase and Builder Tools Category

[katomm]

• Add Governance category to showcase and builder tools, rework the category colors to make them more distinct.

Add new showcases:

• https://gov.tools (new Governance Category, made this favorite)
• https://constitution.gov.tools (new Governance Category)
• https://www.changwatch.com (new Governance Category)

Add builder tools:

• https://github.com/CardanoSolutions/zhuli (new Governance Category)
• https://github.com/cardano-foundation/cf-java-rewards-calculation
• https://github.com/cardano-foundation/cf-ledger-sync

[weqanhet]

LGTM 👍🏽

[rphair]

Works well in local build ✅

@katomm in Builder Tools, the adjacent JavaScript and JSON are still roughly the same colour yellow. I tested #80FF77 for JSON in my local build & it looked distinct everywhere (can't directly suggest it here).

[gufmar]

LGTM