feat: check if colnames are duplicated in R

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (87dfe95) 94.92% compared to head (d603be3) 94.86%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #528 +/- ## ========================================== - Coverage 94.92% 94.86% -0.06% ========================================== Files 27 27 Lines 3034 3038 +4 ========================================== + Hits 2880 2882 +2 - Misses 154 156 +2 ``` | [Flag](https://app.codecov.io/gh/abess-team/abess/pull/528/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=abess-team) | Coverage Δ | | |---|---|---| | [Python](https://app.codecov.io/gh/abess-team/abess/pull/528/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=abess-team) | `97.74% <ø> (ø)` | | | [rpackage](https://app.codecov.io/gh/abess-team/abess/pull/528/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=abess-team) | `93.49% <50.00%> (-0.09%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=abess-team#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/abess-team/abess/pull/528?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=abess-team) | Coverage Δ | | |---|---|---| | [R-package/R/initialization.R](https://app.codecov.io/gh/abess-team/abess/pull/528?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=abess-team#diff-Ui1wYWNrYWdlL1IvaW5pdGlhbGl6YXRpb24uUg==) | `94.89% <50.00%> (-0.24%)` | :arrow_down: |

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.