Remove gitignore, update ci.yml, include tool documentations directly

.gitignore

.gitlab-ci.yml

...ation/analysis/cost_estimation/content/getting_started.md

docs/documentation/analysis/cost_estimation/content/index.md

...analysis/cost_estimation/content/operating_cost_method.md

...cost_estimation/content/run_your_first_cost_estimation.md

...umentation/analysis/ecological_assessment/aqi_schaefer.md

...documentation/analysis/ecological_assessment/changelog.md

...n/analysis/ecological_assessment/climate_model_dallara.md

...nalysis/ecological_assessment/figures/lifeCyclePhases.png

...ntation/analysis/ecological_assessment/getting-started.md

docs/documentation/analysis/ecological_assessment/index.md

...umentation/analysis/ecological_assessment/lca_schaefer.md

...cumentation/analysis/ecological_assessment/literature.bib

...ation/analysis/ecological_assessment/mission_emissions.md

...on/analysis/ecological_assessment/softwarearchitecture.md

...ation/analysis/ecological_assessment/standard-strategy.md

...sis/weight_and_balance_analysis/content/basic-concepts.md

...ion/analysis/weight_and_balance_analysis/content/index.md

...ion/analysis/weight_and_balance_analysis/content/usage.md