improve catalog

- add entrie
- add a linter
- lint catalog

TODO.md

@@ -51,6 +51,11 @@
     - [ ] existence of `.local`, `.local/programs`, `.local/bin`
     - [ ] that permissions are ok
     - [ ] that `.local/bin` are in `PATH`
+  - [ ] a linter for the catalog
+  	- [x] rules: entries sorted, check for required field, common mistakes (tag/tags), repo is existing, etc.
+    - [ ] may use a schema instead of hard coded rules
+    - [ ] have a nicer output, with some colors, see what pytest can do
+    - [ ] add an option to fix
   - [ ] UI, add some progress to install (steps : 1/5 check current version, 2/5 ..)
   - [ ] allow to list versions
   - [ ] allow to force installation of a given version