Add Contract Error Documentation Table

[Abd-Standard]

Description

Create a concise reference mapping contract errors to their meaning and expected caller behaviour.

Acceptance Criteria

All public contract errors are documented.

Error identifiers and meanings are listed.

Conditions that trigger each error are described.

Documentation matches the current contract implementation.

[De-wahab001]

@De-wahab001 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello, I’ve reviewed the task and understand the expected outcome. I’m available and would be happy to work on it.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @De-wahab001 to this issue.

[belloaliyu11]

@belloaliyu11 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello Maintainer, I’ve reviewed the issue description and I’m confident I can work on it effectively. Please assign it to me.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @belloaliyu11 to this issue.

[simisann1]

@simisann1 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Heyyy
I’ve gone through the issue carefully and the scope looks clear.
I can take this on fully and deliver a clean, well-structured PR within the Wave timeline.
I’m ready to start as soon as assigned to meee!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @simisann1 to this issue.