chore: many improvements

[ffenix113]

• fix: map all ncs versions from toolchain config
• chore: add simplest semver type - It is a simple implementation, that will be sufficient for its usecase
• chore: add more examples
• chore: simplify cmd & config functions - This is the step forward to remove requirement of urfave/cli.
• fix: version-aware template generation - This would allow to generate different things for different toolchain versions. For example on breaking changes with Zigbee custom implementations.
• feat: generate firmware files for examples when testing - Doing this will be a good way to ensure that examples are staying in sync with configuration & templates.