build(c): improve meson support on Windows

[taozuhong]

Fixed:

1. Meson build issue like Link failed with libadbc_driver_framework.dll.a #4776
2. Generate Vala vapi support

[kou]

Can we add a CI job that uses Meson + MinGW?

[lidavidm]

@taozuhong Why did you close this and open a new, identical PR?

[taozuhong]

Yeah, fixed and merged your comments, merge them into one commit action

[lidavidm]

That's not necessary. We already squash on merge. The new PR lacks context, and it removes attribution for coauthors.

[Copilot]

🟡 Changes recommended

The Windows-specific Meson fix needs Windows CI coverage for exports and system-library linkage.

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Pull request overview

Improves Windows Meson builds by exporting DLL symbols, linking required system libraries, and enabling Vala API generation.

Changes:

• Adds Windows DLL export flags and required libraries.
• Enables VAPI generation by default.
• Fixes generated-header line endings and modernizes Meson path handling.

File summaries

File	Description
c/meson.build	Defines shared-library export arguments.
c/driver/common/meson.build	Exports common-library symbols.
c/driver/framework/meson.build	Exports framework symbols.
c/driver/sqlite/meson.build	Exports SQLite driver symbols.
c/driver/postgresql/meson.build	Adds exports and Winsock linkage.
c/driver_manager/meson.build	Adds exports and Windows libraries.
glib/meson.build	Uses the global source root.
glib/meson_options.txt	Enables VAPI generation by default.
glib/tool/generate-version-header.py	Forces LF-only generated headers.

Review details

• Files reviewed: 9/9 changed files
• Comments generated: 1
• Review effort level: Balanced

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