qgis: add page

pages/common/qgis.md

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+# qgis
+
+> View, create, and analyze geographic data in a Geographic Information System.
+> Supports rasters, vectors, and project files (`.qgs`, `.qgz`, `.qlr`).
+> More information: <https://docs.qgis.org/latest/en/docs/user_manual/introduction/qgis_configuration.html#running-qgis-with-advanced-settings>.
+
+- Launch QGIS:
+
+`qgis`
+
+- Open a specific project file:
+
+`qgis {{[-p|--project]}} {{path/to/project.qgz}}`
+
+- Open one or more raster or vector files directly:
+
+`qgis {{path/to/file1.tif path/to/file2.shp ...}}`
+
+- Hide the splash screen on startup:
+
+`qgis {{[-n|--nologo]}}`
+
+- Set the initial map extent:
+
+`qgis {{[-e|--extent]}} {{xmin,ymin,xmax,ymax}}`
+
+- Run a Python script on load:
+
+`qgis {{[-f|--code]}} {{path/to/script.py}}`
+
+- Launch QGIS without restoring plugins:
+
+`qgis {{[-P|--noplugins]}}`
+
+- Skip prompts for missing layers when opening a project:
+
+`qgis {{[-B|--skipbadlayers]}} {{[-p|--project]}} {{path/to/project.qgz}}`