Adding path registration capabilities

Adding functions to allow register paths instead of full STAC items

This adds a full path from CLI to registering functions. The whole registration process is separated from the item based registration and includes path based pre-/post-/error-handlers and backends.

• Implementation
• Documentation
• Tests

assigned to @fabian.schindler

added 20 commits

• 5ebc4c8e...e7d6fd16 - 20 commits from branch master

Compare with previous version

added 1 commit

• 1d06e931 - 1 commit from branch master

Compare with previous version

changed target branch from master to main

added 7 commits

• 1d06e931...67a5904f - 5 commits from branch main
• a61f8df4 - Merge branch 'main' of gitlab.eox.at:vs/core into path-registration
• bd23ca8c - Adding registrar documentation to README

Compare with previous version

added 1 commit

• aa024334 - Fixing typing issues

Compare with previous version

added 1 commit

• 2eb8117d - Fixing typing issues in config parser

Compare with previous version

marked the checklist item Documentation as completed

marked this merge request as ready

mentioned in commit 1c69e2f0

merged