Adds workflow git aliases for `release-candidate`
Adds workflow git aliases for `release-candidate`

- `release-candidate` = staging branch at Forever™

All workflow aliases:

- For `_` in `d => dev`, `r => release-candidate`, `m => master`:
    - `gco_`  = checkout `_` branch
    - `gco_b` = checkout new branch off of `_`
    - `gre_`  = rebase `_`
    - `gri_`  = rebase --interactive `_`

`grer` and `grir` don't exist due to rarity.

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