feat: rsvp many endpoint to support batch rsvp invites

[AusKarlos87]

Please describe the changes this PR makes and why it should be merged:

Adds the Calendar Rsvp endpoint to submit batch rsvp invites by supplying a userId array and a status string. The endpoint from Guilded does not return a response, but rsvps are automatically picked up and cached (if enabled) via the calendarEventRsvp websocket event.

• [ x ] Code changes have been tested.

Semantic versioning classification:

• [ x ] This PR changes the library's interface (methods or parameters added)
• [ ] This PR includes breaking changes (methods removed or renamed, parameters moved or removed)
• [ ] This PR only includes non-code changes, like changes to documentation, README, etc.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 2ff321e90a061b7a5c13649fcedc8d0aa828bd35

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

| Name | Type | | ------------------------------ | ----- | | @guildedjs/guilded-api-typings | Patch | | guilded.js | Patch | | @guildedjs/rest | Patch | | @guildedjs/ws | Patch | | @guildedjs/gil | Patch | | @guildedjs/proxy-service | Patch |

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