Mason fails to install `r-languageserver` due to `bspm` conflict on Ubuntu

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Hi there,

I'm not entirely sure I understand the issue, but it seems that Mason fails to install `r-languageserver` because of how the [`bspm`](https://cran4linux.github.io/bspm/) package bridges R and the Ubuntu system package manager. This can interfere with Mason’s installation process, and users should be aware of it.

Installing R packages on Ubuntu/Linux can be tricky due to the interaction between R’s package system and APT (the Advanced Package Tool). To help with this, there’s a [special repository](https://github.com/eddelbuettel/r2u) that provides [Ubuntu binaries](https://cran.r-project.org/bin/linux/ubuntu/#install-r) and a package called [`bspm`](https://cran4linux.github.io/bspm/), which allows `install.packages()` to use APT behind the scenes.

The problem is that a default R installation in Ubuntu automatically loads `bspm` via the system-wide `.Rprofile.site` file (usually located at `/etc/R/Rprofile.site`), and this can conflict with how Mason installs LSPs.

**Temporary fix**:

Open `/etc/R/Rprofile.site` as Administrator and comment out the `bspm` calls before running `:MasonInstall r-languageserver` in Neovim. For example:

```r
# suppressMessages(bspm::enable())
# options(bspm.version.check=FALSE)
```

I hope this helps.

Thank you for this great plugin!

Start by reproducing `:MasonInstall r-languageserver` on Ubuntu with the default `/etc/R/Rprofile.site`, then compare the result after commenting out the documented `bspm` calls. The issue does not define a desired code change; completion would require an agreed fix or documentation update for this conflict.

Written by the indexing model from the issue text.