fix: stress testing + stability improvements

[rustonbsd]

Tests:

• added stress-test
• added reliability-test

Refactors:

• direct_connect connection management
• router ip state machine
• network gossip discovery Rewrite with signed peer bep. proposal by @Nuhvi iroh-topic-tracker#16
• authentication iroh-lan improvements iroh-auth#5
• L3 packet handling (checksum etc)
• and prob more, will add later

[rustonbsd]

Release builds here:

https://github.com/rustonbsd/iroh-lan/releases/tag/v1.0.0-rc1

For testers:
please leave a comment with your findings, the more bugs the better!

Note that by switching out the discovery mechanism the authentication now (till iroh 0.96 release) happens only on the direct connection layer, iroh-gossip topics can be leaked from mainline dht and used to show up in the ui as a peer, before accepting or creating any connections, the network name and password are used for authentication.
Tldr: your network is not exposed; malicious actors can show up in the ui

Whats new

• Added stress tests with network degradation (v0.1.2 had a throughput of 1-2mbit/sec and failed the long-term game_check after ~1-2min; v1.0.0-rc1 throughput 35-45mbit/sec passed 8 hour test without failures)
• Network core refactor
• Way faster bootstrapping
• Possible after crates.io release: caro install iroh-lan
• New CLI TUI mode iroh-lan mynetwork --password supersecret
• CLI without TUI --no-display