docs: improve release notes generation

[jdx]

No description provided.

[Copilot]

Pull Request Overview

Improves the release notes generation process by replacing manual git tag parsing with automated git-cliff tool integration.

• Replaces manual git tag message extraction with git cliff for automated release notes generation
• Simplifies the release workflow by removing complex sed parsing logic

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[Copilot]

The --strip all flag may remove important formatting from release notes. Consider using --strip header instead to preserve section formatting while only removing the header, or verify that all doesn't strip too much content.

Suggested change

	mise x -- git cliff --tag "$VERSION" --strip all > /tmp/release-notes.txt
	mise x -- git cliff --tag "$VERSION" --strip header > /tmp/release-notes.txt

[github-actions]

Hyperfine Performance

mise x -- echo

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.1 x -- echo	18.6 ± 0.3	18.1	21.3	1.00
mise x -- echo	18.7 ± 0.3	18.0	20.5	1.01 ± 0.03

mise env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.1 env	18.2 ± 0.3	17.6	19.3	1.00
mise env	18.2 ± 0.5	17.7	23.5	1.00 ± 0.03

mise hook-env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.1 hook-env	17.7 ± 0.3	17.1	21.3	1.00
mise hook-env	17.9 ± 0.3	17.3	19.5	1.01 ± 0.03

mise ls

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.9.1 ls	16.1 ± 0.2	15.6	17.3	1.00
mise ls	16.4 ± 0.3	15.7	17.7	1.02 ± 0.03

xtasks/test/perf

Command	mise-2025.9.1	mise	Variance
install (cached)	165ms	✅ 103ms	+60%
ls (cached)	61ms	62ms	-1%
bin-paths (cached)	66ms	65ms	+1%
task-ls (cached)	470ms	468ms	+0%

✅ Performance improvement: install cached is 60%