Vault: Implement CreateTokenMetadata

[aoikurokawa]

Motivation

• Closes #8

Solution

• Add implementation of creating token metadata

[aoikurokawa]

Hi @buffalu @coachchucksol Can you review for it? Thank you so much!!

[buffalu]

hey, was skimming token standards on solana + i think it makes sense to use the metaplex one as its a "centralized registry" for tokens + apps use. i think the library you're using is meant to be used with token22 metadata pointer: https://spl.solana.com/token-2022/extensions#metadata-pointer

the recommended library is the metadata library: https://github.com/metaplex-foundation/mpl-token-metadata

you can look at an example of using it here: https://github.com/solana-labs/solana-program-library/blob/48b8381f8ac272e27b9425eac6aade669da915dc/stake-pool/program/src/processor.rs#L3168

[aoikurokawa]

I need to modify lrt_mint to vrt_mint.

[aoikurokawa]

@buffalu Thank you for reviewing!!

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 78.44311% with 36 lines in your changes missing coverage. Please review.

Project coverage is 69.10%. Comparing base (6030310) to head (043928f). Report is 1 commits behind head on master.

Files	Patch %	Lines
vault_sdk/src/inline_mpl_token_metadata.rs	61.84%	29 Missing :warning:
vault_core/src/loader.rs	50.00%	6 Missing :warning:
vault_program/src/create_token_metadata.rs	98.07%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #32 +/- ## ========================================== + Coverage 68.54% 69.10% +0.56% ========================================== Files 85 86 +1 Lines 7067 7228 +161 ========================================== + Hits 4844 4995 +151 - Misses 2223 2233 +10 ```

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