jeandemanged

### Describe the current behavior On powsybl-core actions API side, we can define TerminalsConnectionAction-s (since https://github.com/powsybl/powsybl-core/releases/tag/v6.2.0, see https://github.com/powsybl/powsybl-core/pull/2843), but no python bindings are provided. ### Describe the expected behavior Python...

### Describe the current behavior With the introduction of https://github.com/powsybl/powsybl-core/pull/3139 in CGMES importer, getting e.g. line data frame on large CGMES based networks using `all_attributes=True` is really slow (tens of...

### Describe the current behavior On powsybl-core actions API side, we can define DanglingLineAction-s (since https://github.com/powsybl/powsybl-core/releases/tag/v6.3.0, see https://github.com/powsybl/powsybl-core/pull/2903), but these actions are not simulated by OLF. ### Describe the expected...

[WIP] Handle fictitious bus injections

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**Please check if the PR fulfills these requirements** - [ ] The commit message follows our guidelines - [ ] Tests for the changes have been added (for bug fixes...