Coroutine yield helper module

[gwigz]

Should be able to use SLua coroutines to flatten callback APIs into sequential code, including the following.

Runtime

• spawn(fn) run a function inside a coroutine so it can yield
• waitFor(event, filter?) yield until an LLEvents event fires (with optional predicate)
• sleep(seconds) yield for N seconds via LLTimers.once

Dataserver Wrappers

• requestAgentData(id, type) yields, returns string
• requestDisplayName(id) yields, returns string
• requestSimulatorData(region, type) yields, returns string
• requestInventoryData(item) yields, returns string
• readNotecardLine(name, line) yields, returns string
• readNotecard(name) yields, returns string[] (loops until EOF)
• findNotecardTextCount(name, pattern, opts) yields, returns string

Key-Value Store Wrappers (dataserver-based)

• kvRead(key) -> { ok: boolean, value: string }
• kvCreate(key, value) -> boolean
• kvUpdate(key, value) -> boolean
• kvDelete(key) -> boolean
• kvSize() -> { used: number, total: number }

Dialog & TextBox

• dialog(avatarId, text, buttons) yields, returns button text (manages listen channel internally)
• textBox(avatarId, text) yields, returns typed text

HTTP

• httpRequest(url, params, body) yields, returns { status, metadata, body }

Permissions

• requestPermissions(avatarId, mask) yields, returns granted flags
• transferMoney(avatarId, amount) yields, returns { success, message }

Sensor

• sensor(name, id, type, range, arc) yields, returns DetectedEvent[] | null

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Note, I'm not sure but there's probably also plans for official callback style APIs at some point, but this may still be good as a stand in.