fix cache documentation with missing isTag parameter

[naaa760]

fixes: #4905

Description:

This PR fixes critical issues in the Drizzle cache documentation that were preventing proper implementation of custom cache classes.

Problems Fixed:

• Missing isTag parameter in get() and put() method signatures
• Incorrect parameter name (key instead of hashedQuery) in put method
• Lack of documentation explaining tag-based vs regular cache entries

Changes Made:

• ✅ Updated method signatures to match the actual Cache interface
• ✅ Added comprehensive explanation of isTag parameter usage
• ✅ Provided both simple and advanced implementation examples
• ✅ Cleaned up unnecessary formatting and comments for clarity
• ✅ Added detailed examples showing how to handle tag-based caching properly

Impact:
Developers can now implement custom cache classes that compile correctly and properly handle both regular queries and tag-based cache entries as intended by the Drizzle cache system.

Files Changed:

• drizzle-orm/src/cache/readme.md