Resolves #6151.

I read the implementation and confirmed it overrode the default.
It seems it's the intended behaviour since the initial PR
#1571.

)

This addresses the issue in discussion #5472.

Mise on nushell on windows doesn't properly convert the path to a
nushell-native list. Most of the time this works fine, as long as the
path stays a string. However, if anything else adds a value to the path
(like manually activating a python venv), you end up with a list of 2
items: the big, `;` delimited string that was $env.PATH, and one entry
for whatever was just added (now the only valid item in the path list).

The problem comes from this function in the activate script:

```nu
def --env "update-env" [] {
     # ...
     if $var.name == 'PATH' {
        $env.PATH = ($var.value | split row (char esep))
     } else {
    # ...
}
```

`$env.PATH` is case-insensitive in nushell [1] (actually, all
environment variables are, regardless of OS [2]). Mise matches whatever
capitalization is in use at run time [3], which for windows is `Path`.
For the sake of the update hook though, in case something changes the
capitalization of `$env.PATH` between activating mise and some later run
of the hook, it's probably just better to do this comparison in a
case-insensitive way.

[1]: https://www.nushell.sh/book/configuration.html#path-configuration
[2]: https://www.nushell.sh/book/environment.html#case-sensitivity
[3]:
https://github.com/jdx/mise/blob/b7583ea9cc43c78e60d044640d149958e71261e4/src/env.rs#L225C1-L231C4

Co-authored-by: Zack Yancey <mail@zackyancey.com>

`tracing-subscriber` needs to be updated.
GHSA-xwfj-jgwm-7wp5

Moved `try_with_v_prefix` from `github.rs` to `static_helper.rs` and
used it from `ubi` backend too.

I was just trying to set a backend alias for `maven` (since aqua is
mostly behind with latest versions) and figured that i am not able to do
so with the `alias set` command. While `config set` works, it is not
obvious and does not allow for removal.

---------

Co-authored-by: mise-en-dev <release@mise.jdx.dev>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

Addresses the installation issue with FreeBSD mentioned in #6135.
Executing Linux binaries on FreeBSD requires Linux compatibility to be
enabled. Guess this is save to take for granted given `mise` is run on
FreeBSD (without a specific build).

Co-authored-by: mise-en-dev <release@mise.jdx.dev>

Reworked some portions of the script for `mise activate pwsh` so it
works as expected with powershell v5 as well as pwsh v7.

- Now works with Default Powershell Vendored with Windows
- Added an environment variable, `$env:MISE_PWSH_CHPWD_WARNING`, which
can be set to disable warning
- Needed to disable chpwd for v5 powershell due to limitations of
powershell itself.
- Reworked argument parsing to avoid powershell v5 causing issue where
when it tries to get currently issued command, it breaks.

v5 Before:
<img width="1427" height="552" alt="image"
src="https://github.com/user-attachments/assets/ac0d0840-d732-451c-b68d-c48b5409142d"
/>

v5 After:
<img width="1716" height="426" alt="image"
src="https://github.com/user-attachments/assets/cf99579a-d04d-48d3-8b11-235933daded2"
/>


v7 Before:
<img width="1412" height="210" alt="image"
src="https://github.com/user-attachments/assets/cee8f34e-5d66-4151-8105-5cdb16021337"
/>


v7 After
<img width="1635" height="283" alt="image"
src="https://github.com/user-attachments/assets/a216cecc-5b17-4baa-89be-35dd88073818"
/>

### 🚀 Features

- allow set/unset backend aliases by [@roele](https://github.com/roele)
in [#6172](#6172)

### 🐛 Bug Fixes

- **(aqua)** respect order of asset_strs by
[@risu729](https://github.com/risu729) in
[#6143](#6143)
- **(java)** treat freebsd as linux (assuming linux compatability) by
[@roele](https://github.com/roele) in
[#6161](#6161)
- **(nushell/windows)** Fix $env.PATH getting converted to a string by
[@zackyancey](https://github.com/zackyancey) in
[#6157](#6157)
- **(sync)** create uv_versions_path dir if it doesn't exist by
[@risu729](https://github.com/risu729) in
[#6142](#6142)
- **(ubi)** show relevent error messages for v-prefixed tags by
[@risu729](https://github.com/risu729) in
[#6183](#6183)
- remove nodejs/golang alias migrate code by
[@risu729](https://github.com/risu729) in
[#6141](#6141)

### 📚 Documentation

- **(task)** remove word "additional" to avoid confusions by
[@risu729](https://github.com/risu729) in
[#6159](#6159)

### Chore

- update Cargo.lock by [@risu729](https://github.com/risu729) in
[#6184](#6184)

### New Contributors

- @zackyancey made their first contribution in
[#6157](#6157)