Sync fork with upstream (earthaccess-dev/earthaccess) while preserving multi-feature search support

[Copilot]

Description

Syncs tiagodc/earthaccess:main with the latest earthaccess-dev/earthaccess:main (20+ commits ahead since Feb 13, 2026) while preserving the multi-feature spatial search methods introduced in PR earthaccess-dev#1109.

Upstream changes incorporated

• Docs restructure: docs/user_guide/ → docs/user/, docs/user-reference/ → docs/api/, docs/contributing/ → docs/contributor/, docs/howto/ + docs/tutorials/ → docs/user/howto/ + docs/user/tutorials/
• New: .binder/ config, check-links.yml workflow, test_geo_interface.py, contributor/pr-guide.md, docs/governance/decisions/929-move-repository.md
• Updated: earthaccess/results.py, earthaccess/store.py, earthaccess/api.py, pyproject.toml, uv.lock, and more

Preserved from tiagodc's 7 commits (PR earthaccess-dev#1109)

• earthaccess/search.py — Added multipoint, multipolygon, multi_bounding_box, multiline, multicircle methods to DataGranules
• docs/user/search.md — "Multi feature support" section re-applied at new file location
• CHANGELOG.md — Multi-feature search entry added to [Unreleased] → ### Added
• tests/integration/test_search_data.py — 5 integration tests for new multi-feature methods

# Example: search granules intersecting any of multiple polygons
results = earthaccess.search_data(
    short_name="ATL06",
    multipolygon=[polygon1, polygon2],
)

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Merge checklist

• PR title is descriptive
• PR body contains links to related and resolved issues (e.g. closes #1)
• If needed, CHANGELOG.md updated
• If needed, docs and/or README.md updated
• If needed, unit tests added
• All checks passing (comment pre-commit.ci autofix if pre-commit is failing)
• At least one approval

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