add scripts/beer.md

Signed-off-by: hwipl <33433250+hwipl@users.noreply.github.com>

scripts/beer.md

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+# beer.tcl
+
+The script [beer.tcl](beer.tcl) gives a beer to people with the `!beer`
+command.
+
+## Setup
+
+You can enable the `!beer` command for a specific channel by setting the
+`beer` flag for the channel in your Eggdrop. For example, enable the script in
+the channel `#test` with the following Eggdrop command:
+
+```
+.chanset #test +beer
+```
+
+Accordingly, you can disable the `!beer` command for a specific channel by
+removing the `beer` flag from the channel in your Eggdrop. For example, disable
+the script in the channel `#test` with the following Eggdrop command:
+
+```
+.chanset #test -beer
+```
+
+## Usage
+
+After enabling the script and the `!beer` command in a channel, you can use the
+`!beer` command in that channel as shown below.
+
+Give a beer to yourself:
+
+```
+!beer
+```
+
+Give a beer to a specific user with the name `<user>`:
+
+```
+!beer <user>
+```
+
+## Examples
+
+Example of giving yourself a beer:
+
+```
+13:35 <@hwipl> !beer
+13:35  * FooBot gives hwipl an ice cold beer.
+```
+
+Example of giving another user a beer:
+
+```
+13:35 <@hwipl> !beer otheruser
+13:35  * FooBot gives otheruser an ice cold beer.
+```