Add comprehensive URL redirects for legacy /docs/* paths

Description

Added comprehensive URL redirects to handle legacy paths that were causing 404 errors for users. This change ensures users accessing documentation through old URLs like /docs/tutorials/rag or /docs/intro are properly redirected to the new paths.

Key Changes

Added redirects for main sections:

/docs/intro/* → /intro
/docs/faqs/* → /faqs
/docs/cheatsheet/* → /cheatsheet
/docs/dspy-usecases/* → /dspy-usecases

Added redirects for Quick Start:

/docs/quick-start/installation/* → /quick-start/installation
/docs/quick-start/getting-started-01/* → /quick-start/getting-started-01
/docs/quick-start/getting-started-02/* → /quick-start/getting-started-02

Added redirects for Deep Dive:

/docs/deep-dive/data-handling/examples/* → /deep-dive/data-handling/examples
Plus other deep-dive section redirects

Added redirects for Tutorials:

/docs/tutorials/rag/* → /tutorials/rag
/docs/tutorials/simplified-baleen/* → /tutorials/simplified-baleen
/docs/tutorials/summarization/* → /tutorials/summarization
/docs/tutorials/other_tutorial/* → /tutorials/other_tutorial
/docs/tutorials/examples/* → /tutorials/examples

Implementation Details

Used mkdocs-redirects plugin for handling redirects
Added both /index.md and direct .md variants for each path
Organized redirects by sections for better maintainability
Maintained all existing configuration while adding new redirects

Testing Done

Verified all redirects work locally using mkdocs serve
Tested specific URLs:

Setup Required


pip install mkdocs-redirects

stanfordnlp / dspy

Add comprehensive URL redirects for legacy /docs/* paths #1679