fix(es_extended/server/modules/callback): refactor var naming & fix potential nil errors

[WirzRexTon]

Renamed local variable table to request to avoid shadowing Lua's global table library.

Corrected function names ServerRecieve and ClientRecieve → ServerReceive / ClientReceive.

Standardized "unknown" string casing for GetInvokingResource() comparisons.

Added fallback in AwaitServerCallback: table.unpack(p.value or {}) to prevent nil errors.

Description

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Motivation

Shadowing the Lua global table library with a local variable, which could break table.unpack.
Misspelled function names (ServerRecieve / ClientRecieve) causing confusion.
Inconsistent casing of "unknown" in resource checks, which could lead to logical errors.
Potential runtime errors if p.value is nil when awaiting a server callback.
Overall, these corrections improve code safety, reliability, and readability.

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Implementation Details

Renamed the local variable table to request to preserve access to the global table library.

Corrected function names to ServerReceive and ClientReceive.

Standardized "unknown" string in all GetInvokingResource() comparisons.

Added a fallback in ESX.AwaitServerCallback: table.unpack(p.value or {}) to prevent nil errors.

PR Checklist

• [ X] My commit messages and PR title follow the Conventional Commits standard.
• [ X] My changes have been tested locally and function as expected.
• [X ] My PR does not introduce any breaking changes.
• [X ] I have provided a clear explanation of what my PR does, including the reasoning behind the changes and any relevant context.

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2 out of 4 committers have signed the CLA.

✅ Kenshiin13
✅ Kr3mu
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❌ WirzRexTon
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