feat(config): add cobra-probe-enabled toggle option and safeguard cobra probing (#133)

currently, every command that doesn't have a completion spec is assumed
to be a cobra cli and it gets ran with a `__complete` argument. for non
cobra clis this can cause problems if those non-cobra clis have
sideeffects even when ran with the `__complete` argument, and there is
no way to disable this.
one of these problems was solved at #111, but a full solution would
probably require actual sandboxing which is i think is an overkill just
for attempting to get suggestions for unrecognized commands. instead of
sandboxing, this pr adds a config option for allowing only selected
commands to be probed and disallowing the rest.
currently the default is still allowing all (`["*"]`) so default
behavior is the same, but it might be better to just have a long list of
known cobra clis as the default instead.

here's a demo of a side effect caused by the probing, in this case
"deleting" a file with rmtrash without actually trying to run the
command:

https://github.com/user-attachments/assets/5256d363-5291-42e8-bb4f-cf7467927246

---------

Co-authored-by: shemishtamesh <shemishtamail@gmail.com>

internal/config/config.go

@@ -41,8 +41,9 @@ type CoreConfig struct {
 	ExpandAlias bool   `toml:"expand-alias"`
 	AutoExecute bool   `toml:"auto-execute"`
 	// 0 = shell history, 1 = atuin only, 2 = atuin + shell
-	Atuin       int    `toml:"atuin-history"`
-	AtuinDBPath string `toml:"atuin-db-path"`
+	Atuin             int    `toml:"atuin-history"`
+	AtuinDBPath       string `toml:"atuin-db-path"`
+	CobraProbeEnabled bool   `toml:"cobra-probe-enabled"`
 }
 
 type UIConfig struct {