Add --prefix and --suffix Flags to ExportCommand in CLI

[rannn505]

Suggestion

Enhance the ExportCommand functionality in the CLI by introducing two new optional flags: --prefix and --suffix. These flags will allow users to append a fixed string to the beginning (--prefix) or end (--suffix) of each Config Key in the export result.

Example Usage:

conifgu eval ... | configu export --prefix "MYAPP_" --suffix "_PROD"

In the above example, if we have a Config Key named DATABASE_URL, the export result would transform it into MYAPP_DATABASE_URL_PROD. This functionality is particularly useful when different environments or systems require specific naming conventions for configuration keys.

Motivation

The addition of --prefix and --suffix flags will provide users with greater control over the format of their exported configuration keys, making it easier to adapt the output for different deployment environments or system requirements.

Context

connected to #333

    prefix: Flags.string({
      description: `Append a fixed string to the beginning of each Config Key in the export result`,
    }),
    suffix: Flags.string({
      description: `Append a fixed string to the end of each Config Key in the export result`,
    }),

[RonConfigu]

Development Plan

• Research
• Add example to examples in cli/commands/export.ts
• Add prefix and suffix flags to configu export
• Create function keysMutations -> this func will return undefined if no --prefix or --suffix is requested or (key:string)=>string otherwise.
• Add keys:keysMutations() to ExportCommand params
• Update docs (if necessary)

Questions / Requests

Notes / Comments / Additional

• Important Trying to set the --prefix to 'H' show the command help. To bypass this we must use =. eg configu export --prefix=h
  @RichardAkman | @rannn505 | @pelegpor
• As requested by @rannn505, Casing will apply last. Including the prefix and suffix