📝[Docs]: Add SQL Stored Procedures, Functions, Triggers docs

[dinesh-2047]

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Issue Description

i would like to add Stored Procedures, Functions, Triggers docs (Advance topics ), Kindly assign this issue to me and also add label of hacktoberfest

Suggested Change

Add Stored Procedures, Functions, Triggers : -
1.Stored Procedures – reusable blocks with parameters
2.User-defined Functions – scalar, inline, table-valued
3.Triggers – BEFORE / AFTER triggers for insert/update/delete events

Rationale

No response

Urgency

Medium

Record

• I have read the Contributing Guidelines
• Are you a GSSOC'25 contributor
• I want to work on this issue

[github-actions]

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[github-actions]

👤 Issue assigned to @dinesh-2047.

[ParthShikhare19]

@dinesh-2047 can I do this?