fix some docs links

[carlosabadia]

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[greptile-apps]

Greptile Overview

Greptile Summary

This PR fixes broken documentation links across three files:

• case-studies/bayesline.md: Updated the AG Grid reference from the non-existent library.tables_and_data_grids.ag_grid module to the correct enterprise.ag_grid.index path, fixing a broken link in the case study
• docs/library/data-display/callout-ll.md: Corrected the icon component link from /docs/library/datadisplay/icon/ (missing hyphen) to /docs/library/data-display/icon/
• pcweb/pcweb.py: Added a new redirect from /docs/overview to /docs/getting-started/introduction to handle legacy URL patterns

All changes are straightforward link corrections that improve documentation navigation. The routing system uses to_kebab_case() to automatically convert underscore-separated directory names to hyphen-separated URLs, so the redirect follows the established pattern.

Confidence Score: 4/5

• This PR is safe to merge with only documentation link fixes
• The PR contains only documentation link corrections with no code logic changes. All fixes are valid: the AG Grid path now correctly points to the enterprise module, the icon link has proper hyphenation, and the new redirect follows the framework's routing conventions. Score reduced by 1 due to an erroneous review comment about the redirect path - the comment incorrectly flags the redirect as using wrong separators, when in fact the framework's to_kebab_case() function automatically converts underscores to hyphens in URLs.
• No files require special attention - all are simple link corrections

Important Files Changed

Filename	Overview
case-studies/bayesline.md	Fixed import from library to enterprise and updated AG Grid link path
docs/library/data-display/callout-ll.md	Fixed broken internal link from /docs/library/datadisplay/icon/ to correct path with hyphens
pcweb/pcweb.py	Added redirect from /docs/overview but target path uses incorrect separator (hyphen instead of underscore)

Sequence Diagram

sequenceDiagram
    participant User
    participant Browser
    participant App as Reflex App
    participant Routing as Routing System
    participant FileSystem as File System
    
    Note over User,FileSystem: Documentation Link Fix Flow
    
    User->>Browser: Clicks broken link in case study
    Browser->>App: Request /docs/library/tables_and_data_grids/ag_grid
    App->>Routing: Route lookup
    Routing->>FileSystem: Check route mappings
    FileSystem-->>Routing: Route not found (404)
    Routing-->>App: No matching route
    App-->>Browser: 404 Error
    Browser-->>User: Page not found
    
    Note over User,FileSystem: After PR Fix
    
    User->>Browser: Clicks fixed link in case study
    Browser->>App: Request /docs/enterprise/ag-grid/
    App->>Routing: Route lookup
    Routing->>FileSystem: enterprise.ag_grid.index.path
    FileSystem-->>Routing: Valid route found
    Routing-->>App: Return AG Grid docs component
    App-->>Browser: Render AG Grid documentation
    Browser-->>User: Display correct page

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