Add tag for disabling screenshots (Part of the Better Exam Support Pr…

…oject) (#1470)

Add the tag user.disable_screenshots to make it easier for users to
disable screenshot commands in certain circumstances. This was part of
the project discussed in a community meeting to add built in
functionality to community itself to make it easier to disable certain
commands under specific circumstances, such as when taking an exam.

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

plugin/screenshot/screenshot.py

@@ -7,6 +7,8 @@
 
 mod = Module()
 
+mod.tag("screenshot_disabled", desc="Activating this tag disables screenshot commands")
+
 default_folder = ""
 if app.platform == "windows":
     default_folder = os.path.expanduser(os.path.join("~", r"OneDrive\\Pictures"))

plugin/screenshot/screenshot.talon

@@ -1,3 +1,6 @@
+not tag: user.screenshot_disabled
+-
+
 ^grab screen$: user.screenshot()
 ^grab screen <number_small>$: user.screenshot(number_small)
 ^grab window$: user.screenshot_window()