Add readme.md to sub-folders

[ValarDragon]

Summary

Add README.md to sub-folders on github, that explains what is in the directory, and has a redirect link to any applicable docs / specs.

Problem Definition

When looking at the SDK code, the responsibility of each folder is not immediate. For instance, it is very unclear from just the name, what /server or /crypto are doing. Adding a readme that explains what you expect to see in each folder would be greatly expedite finding code about the SDK infrastructure.

Modules

• x/bank (chore: collapse module spec and readme #13143)

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For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned

[fedekunze]

yeah, agree. At least we should have a doc.go file too

[zramsay]

relate to #10588

[tac0turtle]

This has overlap with how the spec folder is written, do you suggest we move the spec readmes to the top level?

[tac0turtle]

would consider this closed now

[ValarDragon]

@marbar3778 for osmosis we decided to move spec README to be top level, and ditch the multi-file spec structure

[alexanderbez]

@marbar3778 for osmosis we decided to move spec README to be top level, and ditch the multi-file spec structure

Yes, huge fan of this!

[tac0turtle]

hmm one big file? are you not worried about ending up with a huge file?

[alexanderbez]

IMO it's fine if you have a ToC up top.

E.g. https://github.com/osmosis-labs/osmosis/blob/main/x/gamm/README.md

[tac0turtle]

If people are fine with this then lets do it.