feat(library): Best AI Agents for Spreadsheet Analysis in Excel and Google Sheets (#9886)

* feat(library): Best AI Agents for Spreadsheet Analysis in Excel and Google Sheets

* fix(library): lead the spreadsheet guide's Sim section with the AI workspace definition

* fix(library): use teams instead of users for audience wording

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Co-authored-by: Sim Pi Agent <pi@sim.ai>

Author: waleedlatif1