Integration view: Improve File Visibility Approach

[lordrip]

Problem

The Kaoto browser uses a restrictive "only show" approach for file visibility, hiding many common file types by default and requiring users to manually configure settings to see their files.

Current Behavior

• Only specific file patterns are visible by default
• Common file types (CSV, JSON, YAML) are hidden
• Users must switch between VSCode's default file explorer and Kaoto browser to access hidden files
• Configuration requires understanding regex patterns and knowing which files to include

Expected Behavior

• Show all files by default (similar to standard file explorers)
• Provide an "ignore files pattern" setting instead of "include files pattern"
• Allow users to hide specific files/patterns if desired
• Reduce friction and configuration overhead for new users

Proposed Solution

• Switch from allowlist approach to blocklist approach
• Use *.* or similar pattern to show all files by default
• Replace current "include pattern" setting with "ignore pattern" setting
• Let users fine-tune visibility by hiding unwanted files rather than showing wanted ones

[lordrip]

Let's investigate if having the file explorer in the Kaoto perspective would be possible instead.