feat: add static location and live location support

[arnautov-anton]

Description of the changes, What, Why and How?

This PR adds

• LiveLocationManager class - helper to handle registered live locations (see use in React SDK PR)
• Channel.sendStaticLocation - sends a message with single static_location attachment
• Channel.startLiveLocationSharing - sends a message with single live_location attachment and dispatches local live_location_sharing.started event to notify LiveLocationManager instances
• Channel.stopLiveLocationSharing - dispatches local live_location_sharing.stopped event to notify LiveLocationManager instances (should probably just update message attachment with stopped_sharing instead)

[github-actions]

Size Change: +31.7 kB (+6.83%) 🔍

Total Size: 495 kB

Filename	Size	Change
dist/browser.es.js	108 kB	+7.14 kB (+7.07%)	🔍
dist/browser.full-bundle.min.js	60 kB	+3.01 kB (+5.29%)	🔍
dist/browser.js	109 kB	+7.19 kB (+7.03%)	🔍
dist/index.es.js	108 kB	+7.14 kB (+7.06%)	🔍
dist/index.js	109 kB	+7.18 kB (+7.02%)	🔍

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