Improvements from 2030 study

[lindnemi]

Implements changes from #103 and #129. Closes #103 and #129.

Fixes an upstream bug in the custom costs scaling

Further changes (see changelog.md)

• added 2 delay years to the offshore NEP, s.t. capacity in 2030 is ~20GW
• improved script name modify_industry_demand -> modify_industry_production
• excluded international shipping from DE-specific CO2 emisisons
• improved land transport shares, some RES constraints, some CO2 parameters, gas price in 2025
• disabled ptes before 2035
• add function to limit cross border electricity flows, to comply with the 0.7 security margin and the 0.7 EU trade capacity goals
• Added an option to source industry energy demand from UBA MWMS (Projektionsbericht 2025) for the years 2025-2035
• renamed some scripts

Before asking for a review for this PR make sure to complete the following checklist:

• Workflow with target rule ariadne_all completes without errors
• The logic of export_ariadne_variables has been adapted to the changes
• One or several figures that validate the changes in the PR have been posted as a comment
• A brief description of the changes has been added to Changelog.md
• The latest main has been merged into the PR
• The config has a new prefix of the format YYYYMMDDdescriptive_title