Move plugins to manifest, pin Docker version, add Makefile

- Add plugins.txt listing all plugins for reproducible installs
- Add Makefile with setup/start/stop/install-plugins targets
- Remove user/plugins/ from git tracking
- Pin Docker image to 1.7.49.5-ls244

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/automagic-images/CHANGELOG.md

@@ -1,57 +0,0 @@
-# v1.1.1
-##  01-04-2026
-1. [](#bugfix)
-    * version number was missing from blueprints.yaml, so no automatic updates
-
-
-# v1.1
-##  18-03-2026
-
-1. [](#bugfix)
-    * line breaks are now not removed from output (this interfered with code blocks)
-2. [](#improved)
-    * removed “resized image 0 times” message
-
-
-# v1.0.5
-##  14-06-2021
-
-1. [](#bugfix)
-    * included vendor code…
-
-# v1.0.4
-##  11-06-2021
-
-1. [](#bugfix)
-    * removed debugging code
-
-# v1.0.3
-##  10-06-2021
-
-1. [](#improved)
-    * reverted the output changes because they didn't work for twig-generated content
-
-# v1.0.2
-##  27-05-2021
-
-1. [](#bugfix)
-    * fixed a bit of rogue code from the last update
-2. [](#improved)
-    * added some more information in the README about Grav’s resizing bugs
-
-
-# v1.0.1
-##  25-05-2021
-
-1. [](#improved)
-    * made the output changes that add the sizes attributes cacheable
-
-
-# v1.0
-##  10-05-2021
-
-1. [](#new)
-    * Initial release as a fork from Fredrik Ekelund’s plugin Resize Images, which seems unmaintained
-2. [](#improved)
-    * added translation file and German translation for Admin settings
-    * adapted code from Ole Vik’s plugin Image Scrset to allow sizes attributes to be set per CSS class in the plugin settings