add support for InSAR Explorer

[mahmud1]

Description of proposed changes

save_explorer.py implemented to convert time series and velocity to GRD files compatible with QGIS InSAR Explorer plugin (https://insar-explorer.readthedocs.io/). The documentation is updated accordingly.

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Summary by Sourcery

New Features:

• Adds a new command-line tool save_explorer.py to convert time series and velocity data to GRD files for use with the QGIS InSAR Explorer plugin.

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[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces a new tool, save_explorer.py, to convert MintPy time series and velocity data into GRD files compatible with the QGIS InSAR Explorer plugin. It also includes comprehensive documentation on how to use the new tool and integrate MintPy with the QGIS InSAR Explorer plugin for enhanced visualization of displacement time series.

Sequence diagram for save_explorer.py execution

sequenceDiagram
    participant User
    participant save_explorer.py
    participant readfile.py
    participant save_gmt.py

    User->>save_explorer.py: Executes save_explorer.py with input files and options
    save_explorer.py->>readfile.py: Reads mask file (optional)
    alt velocity file provided
        save_explorer.py->>readfile.py: Reads velocity file
        save_explorer.py->>save_explorer.py: Converts velocity data to mm
        save_explorer.py->>save_gmt.py: Writes velocity data to GRD file
    end
    loop for each timeseries slice
        save_explorer.py->>readfile.py: Reads timeseries data for slice
        save_explorer.py->>save_explorer.py: Converts timeseries data to mm
        save_explorer.py->>save_gmt.py: Writes timeseries data to GRD file
    end
    save_explorer.py-->>User: Completion message

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File-Level Changes

Change	Details	Files
Implemented a new command-line tool save_explorer.py to convert time series and velocity data into GRD files, which are compatible with the QGIS InSAR Explorer plugin.	Added a new command-line tool save_explorer.py in the mintpy.cli module. Implemented the core logic for converting time series and velocity data to GRD format in the mintpy.save_explorer module. Added argument parsing and handling for input files (time series, velocity, mask) and output directory. Included a function to convert the unit of displacement from meter or centimeter to millimeter. Implemented masking functionality to handle masked data points. Integrated the new tool into the main mintpy command-line interface.	src/mintpy/__main__.py src/mintpy/cli/save_explorer.py src/mintpy/save_explorer.py pyproject.toml
Updated the documentation to include instructions on how to use the new save_explorer.py tool and integrate MintPy with the QGIS InSAR Explorer plugin.	Added a new documentation page insar_explorer.md with detailed instructions on setting up QGIS and the InSAR Explorer plugin. Documented the usage of save_explorer.py for converting MintPy results to GRD files. Included instructions on how to load and visualize the exported data in QGIS using the InSAR Explorer plugin. Added a reference to the InSAR Explorer plugin in the QGIS.md documentation page. Updated the mkdocs.yml file to include the new insar_explorer.md page in the navigation menu.	docs/QGIS.md mkdocs.yml docs/insar_explorer.md

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[sourcery-ai]

Hey @mahmud1 - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider adding a test case to verify the functionality of the new save_explorer.py script.
• It would be helpful to include a note about the expected data format (e.g., GeoTIFF, HDF5) for the mask file.

Here's what I looked at during the review

• 🟡 General issues: 4 issues found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟡 Complexity: 1 issue found
• 🟢 Documentation: all looks good

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