stabilize std/encoding

[kt3k]

part of #4600

• fully documented
• fully tested https://app.codecov.io/gh/denoland/deno_std/tree/main/encoding
• no ongoing breaking change discussion
• 1.0.0-rc.1 chore(encoding): release [email protected] #4858
• wait 1 month
• 1.0.0 (stabilization)

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related issues:

• Grouping data format modules under one namespace #3462

[BlackAsLight]

Before this lib is stabilised, would it not be better to change the names of the functions from encodeBase64 to base64Encoder? That way it would follow the naming convention of TextEncoder and TextDecoder. And since streaming versions are being considered to be added, you'd end up with Base64EncoderStream.

[iuioiua]

It'd make sense to call it Base64Encoder if it were a class, but it's a pure function. Hence, the current name, which starts with the corresponding verb, encodeBase64(). The same is true for the other functions.