Feat: Show information about kubeconfig generated file

[emmanuel-quevillon-outscale]

This new option to kubeconfig subcommand display information as table about generated kubeconfig file such as:

$ oks-cli cluster kubeconfig --user dev --group devops --info
+---------+---------+-----------------+---------------------+--------------+--------------------------------------------------------------------------------------------------------+
| Context | User    | Cert Subject    | Expires At          | Cluster Name | Cluster Endpoint                                                                                       |
+---------+---------+-----------------+---------------------+--------------+--------------------------------------------------------------------------------------------------------+
| default | default | CN=dev/O=devops | 2025-09-04 15:08:51 | default      | https://cluster.project-XXXXXXXXX.project.cloudgouv-eu-west-1.oks.outscale.com:6443 |
+---------+---------+-----------------+---------------------+--------------+--------------------------------------------------------------------------------------------------------+

[outscale-ykr]

Functionally of this command is a quite similar with existing oks-cli cache kubeconfigs command.

At least, some existing functions can be used instead of duplicating code.

On my point of view, if we want the --info flag for the kubeconfig command output to be the same as for oks-cli cache kubeconfigs, but for the requested kubeconfig configuration.

Example:

$ oks-cli cache kubeconfigs
+---------+---------+---------------------+
| user | group | expiration date |
+---------+---------+---------------------+
| ykasper | dev | 2025-09-04 09:21:52 |
| default | default | 2025-09-04 09:21:36 |
+---------+---------+---------------------+

$ oks-cli cluster kubeconfig --user ykasper --group dev --info
+---------+---------+---------------------+
| user | group | expiration date |
+---------+---------+---------------------+
| ykasper | dev | 2025-09-04 09:21:52 |
+---------+---------+---------------------+

Surely we can add cluster endpoint, cluster name and so on.

This way we standardize the output of these commands for better UX.
And we will avoid code duplication.

[emmanuel-quevillon-outscale]

--info option has been replace with --output table and another option --wide (related to --output table only) in order to show supplementary info

$ oks-cli cluster kubeconfig --user devops --group admin --output table
+--------+-------+---------------------+
| user   | group | expiration date     |
+--------+-------+---------------------+
| devops | admin | 2025-09-05 14:26:22 |
+--------+-------+---------------------+

$  oks-cli cluster kubeconfig  --output table       
+---------------+-------+---------------------+
| user          | group | expiration date     |
+---------------+-------+---------------------+
| cluster-admin | None  | 2025-09-02 13:06:41 |
+---------------+-------+---------------------+

$  oks-cli cluster kubeconfig --user devops --group admin --output table --wide
+--------+-------+---------------------+--------------+--------------+-----------------+--------------------------------------------------------------------------------------------------------+
| user   | group | expiration date     | context:name | context:user | context:cluster | cluster endpoint                                                                                       |
+--------+-------+---------------------+--------------+--------------+-----------------+--------------------------------------------------------------------------------------------------------+
| devops | admin | 2025-09-05 14:26:22 | default      | default      | default         | https://XXXXXX.YYYYYY-ZZZZZZZZZZZZ.project.cloudgouv-eu-west-1.oks.outscale.com:6443 |
+--------+-------+---------------------+--------------+--------------+-----------------+--------------------------------------------------------------------------------------------------------+

[outscale-ykr]

$ oks-cli --profile ppd cache kubeconfigs
+---------+---------+---------------------+
| user | group | expiration date |
+---------+---------+---------------------+
| ykasper | dev | 2025-09-04 09:21:52 |
| default | default | 2025-09-04 09:21:36 |
+---------+---------+---------------------+

$ oks-cli --profile ppd cluster kubeconfig -o table
+---------------+-------+---------------------+
| user | group | expiration date |
+---------------+-------+---------------------+
| cluster-admin | None | 2025-09-04 09:21:36 |
+---------------+-------+---------------------+

[outscale-ykr]

Looks good for me.
@anton-kutin can you have a look, please ?

[anton-kutin]

My tests are ok

[emmanuel-quevillon-outscale]

My tests are ok

Who is responsible to merge the PR then? @anton-kutin @outscale-ykr @outscale-rce

[outscale-rce]

@anton-kutin is the code owner, I'll let him merge ;)