fix(react-theme): inaccurate and incomplete custom theme tokens

[tianenpang]

📝 Description

Fix inaccurate and incomplete custom theme tokens.

⛳️ Current behavior (updates)

Returns all tokens that are merged with the base theme.

• useTheme
• createTheme
• color-scheme

💣 Is this a breaking change (Yes/No):

No

📝 Additional Information

Pending update...