Update switch documentation for Spark Declarative Pipeline conversion

[yyoli-db]

Changes

Update the documentation of switch for conversion to Spark Declarative Pipeline (SDP).
This will be depend on this PR, which changes switch: https://github.com/databrickslabs/switch/pull/46

What does this PR do?

Relevant implementation details

This is documentation update.

Caveats/things to watch out for when reviewing:

Linked issues

Resolves #..

Functionality

• added relevant user documentation
• added new CLI command
• modified existing command: databricks labs lakebridge ...
• ... +add your own

Tests

• manually tested
• added unit tests
• added integration tests

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.24%. Comparing base (eebf284) to head (5174725).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2174   +/-   ##
=======================================
  Coverage   65.24%   65.24%           
=======================================
  Files         100      100           
  Lines        8506     8506           
  Branches      876      876           
=======================================
  Hits         5550     5550           
  Misses       2769     2769           
  Partials      187      187           

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[github-actions]

✅ 51/51 passed, 10 flaky, 4m10s total

Flaky tests:

• 🤪 test_validate_mixed_checks (164ms)
• 🤪 test_validate_successful_schema_check (162ms)
• 🤪 test_validate_invalid_schema_path (1ms)
• 🤪 test_validate_non_empty_tables (8ms)
• 🤪 test_validate_invalid_schema_check (1ms)
• 🤪 test_transpiles_informatica_to_sparksql_non_interactive[False] (22.685s)
• 🤪 test_transpiles_informatica_to_sparksql (25.352s)
• 🤪 test_transpile_teradata_sql_non_interactive[False] (24.394s)
• 🤪 test_transpiles_informatica_to_sparksql_non_interactive[True] (4.262s)
• 🤪 test_transpile_teradata_sql_non_interactive[True] (8.699s)

_{Running from acceptance #3079}