Add ViewOutput for view calls

	* Also, add a logs to view and transaction calls
	* Check if view call was successfull

Change moderator_pk to Ed25519 pk

Add a moderator_pk for a participant data

Remove redundant unwrap from an ContentType header insert

Implemented TryFrom for PublicKey and SecretKey in dhx

Api requests

From now integration tests can be relaunched immediately even when they was failed.

Add near primitives light

Fix clippy issues in a KeyProvisioner

Use near primitives crate

	For now it's possible to use a "near-primitives" crate,
	because key management logic moved to "common-api"

Added timeout to our functions in `web-client` to avoid potentially possible endless loops & update examples accordingly

- add timeouts to the TS' functons that interact with blockchain and key exchange server

Move "example" server from nginx to node

Remove main branch from ci workflow

Enable integration tests on CI

Remove ssh-agent action because it failed to fetch a proper key name

Add CI badge to README

Refactor near client

	* Improve `NearClient` errors. For now, each action has its own distinguished error
	* Remove `commit_empty` and add `Output for function call.
	* Split RPC calls with an deserialization stage`

Improve keypair API

Start using workspaces directly from git.

	* The reason for this change is the absence of stack trace