[feature] edgeUrl support for Axiom adapter

[gabrielelpidio]

Description

Hey, awesome library! At Axiom, we recently added edge deployments and subsequently added support for them in the SDKs, such as axiom-js. Would love to get support for the adapter in here too, happy to open up a PR with a proposal 😄

Proposed Solution

I imagine the surface would look really similar to axiom-js, meaning something like

export interface BaseAxiomConfig {
  dataset: string
  token: string
  orgId?: string
  timeout?: number
}

interface EdgeAxiomConfig extends BaseAxiomConfig { 
  edgeUrl?: string
}

interface EndpointAxiomConfig extends BaseAxiomConfig {
  url?: string
}

const url = edgeUrl ?? url ?? "https://api.axiom.co"

[HugoRCD]

More than happy to integrate new features, and PR is always welcome 🙌