v0.7.0

This release introduces embedded DNS service for internal service discovery, Compose profiles support, and several improvements for CLI and machine daemon.

## New Features

### Embedded DNS service
- Runs on each machine's IP (10.210.X.1) and handles `.internal` domain.
- Automatically configured for all service containers and used for service discovery (resolves `service-name` and `service-name.internal` to IP addresses of the `service-name` service containers).
- Transparently forwards non-`.internal` queries to upstream DNS servers.
- Can be used as the main nameserver on the machine to simplify service troubleshooting from the host shell. K8s, don't be jealous!
- Fast failure during `machine init/add` if DNS port is already in use.

### Compose profiles
- Support for Compose profiles via `-p/--profile` flag.

### CLI enhancements
- Display version information for `uc` and `uncloudd` binaries with `--version` flag.
- Made all confirmation forms accessible.

## Bug fixes
- Fixed Caddy proxy to only route to healthy containers.
- Fixed panic in `ctx` command when Uncloud config contains only one context. Thanks to @tonyo for reporting.
- Fixed loss of message from child loggers (created with `slog.With`).

## Contributors
Thanks to @cedws for contributing the Compose profiles and CLI `--version` features!

## Changelog
* ef57b62625dae11631d62b6c1ee53b85124682de Merge pull request #50 from cedws/version
* 7861d56dffe524980400702a7fb982e59a960750 Merge pull request #54 from cedws/profiles
* c56385602e93b2866aaee456405ff3ef4b14e6eb chore(dns-server): authoritative responses for internal DNS queries and forwarding to ustream servers
* 70e9385032185e91c596d3211af895007f3dfc9a chore(dns-server): implement resolver for service records that watches container changes
* 6e1165ec57625c71e2895e30632a1f0f334967ec chore(dns-server): make TCP server non-critical; do not exit if it fails to start
* fbbf839258cc42eec789c705a37720aac26496c0 chore: init embedded DNS server
* 769f5e47c326498f6a351e5f2bc7544fae7619c0 feat(dns-server): check system prerequisites when init/add machine: DNS port is not in use by another DNS server
* 8d16da596c6d09b0e6a664c9960870e69a50f83f feat(dns-server): run embedded internal DNS server on machine IP in uncloudd daemon process
* cf7e333579561316a8f41cca9d378c1e33e5c2aa feat(dns-server): use embedded DNS server for all service containers
* 7bc69b9a9e1ccbc973ae5f91a940fc79a3b53466 feat: add support for Compose profiles
* e854bbb3e179ac37ed140366a417e9f01a0422b7 feat: add version flag to main cmd
* eee28e2eada83c7c01840322fa3e1d8e7fa8d8a8 feat: add version flag to uncloudd binary
* 0b8495e96421bea3e0533677333045786be49c24 feat: make all confirmation forms accessible
* 38800924edf19f20142d9d958ca23686832ea20b fix(caddy): proxy to only healthy containers
* 6068e24f4f67fea46d1f0d5fe13f7039f505031b fix(ctx): panic: index out of range when only one context in uncloud config (closes #52)
* d6c06828b311828c3c343be462ea2590060aec6e fix(dns-server): fix constructor and log messages
* db3016fe898f3630660622ce462f2c3c215e5fbd fix: --file flag description for uc deploy cmd
* fe93d91894a049960bb4f981d92e958dc70a5013 fix: attributes handling in SlogTextHandler for child loggers
* 3f70018e7c4e07beb9bbb88c7652d01e9fd9b3ff fix: import cycle in pkg/api