Fix/quick fix

Fix url

Added a new file for explain method that is covered during skill badge

added index name to console log.

Fix/quick fix

refactor: standardize aggregation notebook descriptions and add $set …

adding links to the documentation and remove unnecessary code.

Added summary at the bottom of the page

- Added explanatory text for sort(), limit(), and skip()
- Improved scenario descriptions and renamed variables for better readability
- Adjusted examples to better match the workshop flow
- Added documentation links with UTM tracking
- Removed duplicated exercises already covered in the Find section

- Added explanations for querying array fields with eq(), all(), and in()
- Added examples demonstrating exact array matching behavior
- Improved descriptions around array order and matching semantics
- Added official MongoDB documentation links with UTM tracking
- Refined examples and variable names for better readability

- Added introductory explanations for insert operations
- Added examples using insertOne() and insertMany()
- Improved challenge descriptions and hints
- Added examples of review documents for guidance
- Added MongoDB documentation links with UTM tracking
- Refined wording and examples for better readability

- Added introductory explanations for delete operations
- Added examples using deleteOne() and deleteMany()
- Improved delete challenge instructions and hints
- Refined filter and variable naming for better readability
- Added MongoDB documentation links with UTM tracking
- Added explanations about DeleteResult and deleted document counts

- Added introductory explanations for update operations
- Added examples using updateOne(), set(), addToSet(), and currentTimestamp()
- Added upsert examples and explanations
- Improved challenge instructions and hints
- Refined code formatting and variable naming for readability
- Added MongoDB documentation links with UTM tracking

Feature/crud improvements