Introduce generate share urls api methods

[borismelnik]

Problem

in fact of desktop issue

Implementation

there will be a 3 new methods to generate correct urls:
GenerateCommuntyShareURL which return generated url for community or encrypted community as well (/c/ or /c#)
GenerateCommunityChannelShareURL which return url for channel (/cc/)
GenerateProfileShareURL - which return url for open 1-to-1 chat

new one method to parse the url:
ParseSharedURL which return embedded data from url in JSON

also, 4 tests for every each method.

[igor-sirotin]

Already implemented:

status-go/services/ext/api.go

Lines 1665 to 1695 in c02ebf9

	func (api *PublicAPI) ShareCommunityURLWithChatKey(communityID types.HexBytes) (string, error) {
	return api.service.messenger.ShareCommunityURLWithChatKey(communityID)
	}
	func (api *PublicAPI) ShareCommunityURLWithData(communityID types.HexBytes) (string, error) {
	return api.service.messenger.ShareCommunityURLWithData(communityID)
	}
	func (api *PublicAPI) ShareCommunityChannelURLWithChatKey(request *requests.CommunityChannelShareURL) (string, error) {
	return api.service.messenger.ShareCommunityChannelURLWithChatKey(request)
	}
	func (api *PublicAPI) ShareCommunityChannelURLWithData(request *requests.CommunityChannelShareURL) (string, error) {
	return api.service.messenger.ShareCommunityChannelURLWithData(request)
	}
	func (api *PublicAPI) ShareUserURLWithENS(pubKey string) (string, error) {
	return api.service.messenger.ShareUserURLWithENS(pubKey)
	}
	func (api *PublicAPI) ShareUserURLWithChatKey(pubKey string) (string, error) {
	return api.service.messenger.ShareUserURLWithChatKey(pubKey)
	}
	func (api *PublicAPI) ShareUserURLWithData(pubKey string) (string, error) {
	return api.service.messenger.ShareUserURLWithData(pubKey)
	}
	func (api *PublicAPI) ParseSharedURL(url string) (*protocol.URLDataResponse, error) {
	return protocol.ParseSharedURL(url)
	}