Enhance the leafblower a bit

[0bama272]

Is your feature request related to a problem? Please describe.
The leafblower is relatively fine speaking, but there are some minor issues I have with it.

1.You have to give yourself it using the console, a tiny bit annoying but not too much

2.The default force is locked behind a server cvar, the default force isn't really that strong for most props

3.Could use a sound effect, not required of course but would be nice

Describe the solution you'd like
1.Give the leafblower on spawn similar to the physics gun or add it to impulse 101

2.Either make the commands controlling force client commands based on the user's input, or increase the default to something higher then 16

3.Add a wind blowing sound effect from half life 2 when the weapon is blowing props

(Optional later in development) 4.Give it a custom model and icon

[StressedCatInABox]

This reminds me of the "Make super gravity gun client sided" issue in the same way that making the convars client sided sounds like a BAD idea for server owners to deal with. Adding banditboogaloo's model once the leafblower sourcecode arrives would be neat, however, and sound effects would be cool.