Add go.work files to .gitignore (#4419)

## Changes
Adding `go.work` files to the `.gitignore`, as we don't use monorepos
and don't need it in to be tracked.

See example in .gitignore template collection:
https://github.com/github/gitignore/blob/main/Go.gitignore#L23

## Why
It is convenient when you need to run `go run` from any directory, e.g.
if I have my bundle collection I can do
```
go work init /Users/ilya/www/cli
go run /Users/ilya/www/cli --version
```

Without `go.work` I need to either build the CLI, or configure launch
targets in IDE, or put a bundle inside the CLI repo. Using `go run` is
slightly more convenient, especially when using with agents

## Tests
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Author: ilyakuz-db

.gitignore

@@ -50,3 +50,7 @@ dist/
 # Local development notes, tmp
 /pr-*
 /tmp/
+
+# Go workspace file
+go.work
+go.work.sum