feat(compose): template files during compose operations

[meganwolf0]

Description

Sorry for another massive PR - just to hopefully make the review a little easier going to try and enumerate the bigger things that changed here -

• src/cmd/common/viper.go -> made TemplateConstants and TemplateVariables global. Don't love this pattern but in the interest of not totally redoing this and not having to call "GetTemplateConfig" in every template-able workflow, just ideally will run this once in InitViper
• src/cmd/tools/compose.go -> refactored this command a bit to enable just calling the cmd (mostly for testing, but also I feel like returning the command is a better pattern?)
• src/pkg/common/composition -> added the CompositionContext so it would more easily pass the TemplateRenderer, which basically get used in the sub functions to do the template rendering pieces. Includes options to set those values, I am a fan of this pattern but may not have really done this the best way so if some of this is an anti-pattern lmk
• src/pkg/common/network -> network fetch options to allow for a set base directory, instead of doing the cwd changes. This is pretty coupled to the composition implementation but could possibly be split to a separate PR, it just wouldn't fix the UDS issue on it's own

Related Issue

Fixes #642

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Other (security config, docs update, etc)

Checklist before merging

• Test, docs, adr added or updated as needed
• Schema Updates applied
• Contributor Guide Steps followed

[meganwolf0]

Noticed when testing that case-sensitive keys in constants don't turn into case-sensitive keys in the map[string]interface{} that's created from that key (viper thing) - added a note in the configuration.md and filed associated issue

[brandtkeller]

Partial review - getting a baseline understanding and a super minor fix.

[brandtkeller]

Review cont - Can we run lula internal gen-cli-docs to update docs?