[FEATURE] - Add bump profiles

[oknozor]

Is your feature request related to a problem? Please describe.
cog bump should be able to execute alternate hooks for a named profile.
For example when using the oneflow git branching model performing a release with cog bump works perfectly but if we need to release a hotfix on the current release branch, we are forced to to this manually.

Describe the solution you'd like
cog.toml should support profile this way :

# The default profile (what we have now)
pre_bump_hooks = [
    "cargo bump {{version}}",
]

post_bump_hooks = [
    "git push",
    "git push origin {{version}}",
    "cargo package",
    "cargo publish"
]

[profiles.hotfix]
pre_bump_hooks = [
    # The target branch containing some hotfix commit
    "git checkout release/{{latest_version}}",
    "cargo bump {{version}}"
]

post_bump_hooks = [
    "git push",
    "git push origin {{version}}",
    "git checkout main",
    "git merge --no-ff release/{{latest_version}}",
    "cargo package",
    "cargo publish"
]

[profiles.some_other_usecase]
# And so on

Additional context
This is straight forward to implement, we just need to add the {{previous_version}} or {{latest_version}}, available in the version DSL.