AI #1564: Added transpile helper

[mike-finopsorg]

For those who need to see our example sql in a different engine type.

This helper enables you to switch the language for any sql blocks in markdown

[mike-finopsorg]

I will open an AI for this today and update the title

[shawnalpay]

Per our discussion yesterday, I propose leaving this out of scope for 1.3 and consider bringing it in for a future release.

[ijurica]

Something to consider:

#### Usage

##### Linux / macOS (Bash)

```bash
# List all SQL blocks without transpiling
./sql_transpile.py ../*.md --list

# Transpile all SQL blocks in markdown files to T-SQL
./sql_transpile.py ../*.md --to tsql

# Transpile with dialect preference for detection
./sql_transpile.py ../*.md --to bigquery --prefer trino

# Process specific files
./sql_transpile.py ../file1.md ../file2.md --to postgres
```

##### Windows (PowerShell)

```powershell
# List all SQL blocks without transpiling
python .\sql_transpile.py (Get-ChildItem ..\*.md).FullName --list

# Transpile all SQL blocks in markdown files to T-SQL
python .\sql_transpile.py (Get-ChildItem ..\*.md).FullName --to tsql

# Transpile with dialect preference for detection
python .\sql_transpile.py (Get-ChildItem ..\*.md).FullName --to bigquery --prefer trino

# Process specific files
python .\sql_transpile.py (Get-ChildItem ../file1.md).FullName (Get-ChildItem ../file2.md).FullName --to postgres
```

[mike-finopsorg]

List of dialects is with uppercase but script only handles lowercase

Dialect Hints work out which one doesn't break GitHub and then update README