Consider all xUDT as RGB++ Assets

[Keith-CY]

This feature request comes from the devrel team

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At the current stage, the most powerful asset on CKB is RGB++, but the definition of RGB++ is kinda different between technique and market.

From a technical view, an asset can be considered as RGB++ Asset when it's owned by a RGB++ Lock Script.

But from the perspective of the market, all xUDT assets are potential RGB++ Asset.

Thus comes the feature request:

1. Rename tag RGB++ Compatible to RGB++
2. Mark all xUDT Assets as RGB++ Asset
3. Since All xUDT Assets are RGB++ Assets, the tag RGB++ can be hidden at https://explorer.nervos.org/xudts, but the tag should remain on the page of a specific xUDT.

[Keith-CY]

xUDT compatible assets are not covered in this update.

[Keith-CY]

Please prioritize this issue @Sven-TBD

[Keith-CY]

1. rename rgbpp-compatible to RGB++
2. hide RGB++ in xudt token list
3. display RGB++ on xudt detail page
   are updated by nervosnetwork/ckb-explorer-frontend@3dd5604

[zmcNotafraid]

PR: nervosnetwork/ckb-explorer#2084

[FrederLu]

Verified.