style: use command section headers in create command output

[zimeg]

Changelog

More polish to outputs is arriving to the create command section headers to now reference commands.

Summary

This PR uses command section headers in create command output.

slack-cli/.github/STYLE_GUIDE.md

Lines 65 to 73 in ace60ea

	### Section Formats with Command Headings
	A command often prints information and details about the process happenings. We format this as a section:
	```txt
	📚 App Install
	Installing "focused-lamb-99" app to "devrelsandbox"
	Finished in 2.0s
	```

Preview

Before

before.mov

After

after.mov

Testing

Build this branch and use a judgmental taste! ☕ 😋

$ slack create

Notes

• We don't have a generic "docs help" command but I like how this reads 📚 🐑 💨
• The last line doesn't balance so well but I avoid changing this now

Requirements

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 71.60%. Comparing base (f2e54bc) to head (bd36090).

Files with missing lines	Patch %	Lines
internal/pkg/create/create.go	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #540      +/-   ##
==========================================
+ Coverage   71.56%   71.60%   +0.03%     
==========================================
  Files         224      224              
  Lines       18976    18976              
==========================================
+ Hits        13581    13588       +7     
+ Misses       4192     4189       -3     
+ Partials     1203     1199       -4     

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[mwbrooks]

✅ Very nice!

💅🏻 These titles have been an itch for me for a long time. Thanks for taking the time to update them! 🙇🏻

📝 Left a minor suggestion but non-blocking.

[zimeg]

@mwbrooks Super duper appreciate care toward these refinements! I'm glad we test enough to feel these edges in output and still I dream of some "perfect" output that we might iterate toward! 🏆 🌈 ✨