feat: migrate Mega Evolution Energy to new variant format

[pragmaticivan]

Summary

• Moves thirdParty tcgplayer IDs into the variants array for all 8 cards
• Removes old boolean variants object fields (normal, reverse, holo, firstEdition)

[TCGdexBOT]

🃏 8 Cards Changed

Details: 8 modified, 8 without images

Grass Energy (mee-001) (found using en) (no images)

No images available for this card

File: [data/Mega Evolution/Mega Evolution Energy/001.ts](https://github.com/tcgdex/cards-database/blob/dbcf9aa5ab47d7791af5ff2d5ba5291c62f99e6e/data/Mega Evolution/Mega Evolution Energy/001.ts)
Set: Mega Evolution Energy
Rarity: Common

Fire Energy (mee-002) (found using en) (no images)

No images available for this card

File: [data/Mega Evolution/Mega Evolution Energy/002.ts](https://github.com/tcgdex/cards-database/blob/dbcf9aa5ab47d7791af5ff2d5ba5291c62f99e6e/data/Mega Evolution/Mega Evolution Energy/002.ts)
Set: Mega Evolution Energy
Rarity: Common

Water Energy (mee-003) (found using en) (no images)

No images available for this card

File: [data/Mega Evolution/Mega Evolution Energy/003.ts](https://github.com/tcgdex/cards-database/blob/dbcf9aa5ab47d7791af5ff2d5ba5291c62f99e6e/data/Mega Evolution/Mega Evolution Energy/003.ts)
Set: Mega Evolution Energy
Rarity: Common

Lightning Energy (mee-004) (found using en) (no images)

No images available for this card

File: [data/Mega Evolution/Mega Evolution Energy/004.ts](https://github.com/tcgdex/cards-database/blob/dbcf9aa5ab47d7791af5ff2d5ba5291c62f99e6e/data/Mega Evolution/Mega Evolution Energy/004.ts)
Set: Mega Evolution Energy
Rarity: Common

Psychic Energy (mee-005) (found using en) (no images)

No images available for this card

File: [data/Mega Evolution/Mega Evolution Energy/005.ts](https://github.com/tcgdex/cards-database/blob/dbcf9aa5ab47d7791af5ff2d5ba5291c62f99e6e/data/Mega Evolution/Mega Evolution Energy/005.ts)
Set: Mega Evolution Energy
Rarity: Common

Fighting Energy (mee-006) (found using en) (no images)

No images available for this card

File: [data/Mega Evolution/Mega Evolution Energy/006.ts](https://github.com/tcgdex/cards-database/blob/dbcf9aa5ab47d7791af5ff2d5ba5291c62f99e6e/data/Mega Evolution/Mega Evolution Energy/006.ts)
Set: Mega Evolution Energy
Rarity: Common

Darkness Energy (mee-007) (found using en) (no images)

No images available for this card

File: [data/Mega Evolution/Mega Evolution Energy/007.ts](https://github.com/tcgdex/cards-database/blob/dbcf9aa5ab47d7791af5ff2d5ba5291c62f99e6e/data/Mega Evolution/Mega Evolution Energy/007.ts)
Set: Mega Evolution Energy
Rarity: Common

Metal Energy (mee-008) (found using en) (no images)

No images available for this card

File: [data/Mega Evolution/Mega Evolution Energy/008.ts](https://github.com/tcgdex/cards-database/blob/dbcf9aa5ab47d7791af5ff2d5ba5291c62f99e6e/data/Mega Evolution/Mega Evolution Energy/008.ts)
Set: Mega Evolution Energy
Rarity: Common