feat: Add CORS configuration for browser-based MCP clients (#1059) #1

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	46s
checks / test (3.10, lowest-direct, windows-latest)	1m 11s
checks / test (3.10, highest, windows-latest)	1m 8s
checks / test (3.10, highest, ubuntu-latest)	34s
checks / test (3.10, lowest-direct, ubuntu-latest)	35s
checks / test (3.12, lowest-direct, ubuntu-latest)	32s
checks / test (3.12, highest, ubuntu-latest)	34s
checks / test (3.12, highest, windows-latest)	1m 15s
checks / test (3.11, highest, windows-latest)	1m 14s
checks / test (3.12, lowest-direct, windows-latest)	1m 18s
checks / test (3.11, lowest-direct, ubuntu-latest)	34s
checks / test (3.11, highest, ubuntu-latest)	33s
checks / test (3.13, lowest-direct, windows-latest)	1m 36s
checks / test (3.13, lowest-direct, ubuntu-latest)	36s
checks / test (3.13, highest, ubuntu-latest)	32s
checks / test (3.13, highest, windows-latest)	1m 17s
checks / test (3.11, lowest-direct, windows-latest)	1m 33s
	15m 59s

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