resolveAndValidatePath Shows Inverted Error Messages

[akramcodez]

Description

The resolveAndValidatePath function throws incorrect error messages based on the error type.
Currently:

• ENOENT (path not found) incorrectly throws "Failed to access"
• Other errors like EACCES (permission denied) incorrectly throw "Path does not exist"

This leads to misleading feedback for users and makes debugging harder.

Location

• File: packages/core/src/tools/grep.ts
• File: packages/core/src/tools/ripGrep.ts